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Wikipedia is a
multilingual Multilingualism is the use of more than one language, either by an individual speaker or by a group of speakers. It is believed that multilingual speakers outnumber monolingual speakers in the world's population. More than half of all E ...
free
online encyclopedia An online encyclopedia, also called an Internet encyclopedia, or a digital encyclopedia, is an encyclopedia accessible through the internet. Examples include Wikipedia and ''Encyclopædia Britannica''. Digitization of old content In January 199 ...
written and maintained by a community of
volunteers Volunteering is a voluntary act of an individual or group freely giving time and labor for community service. Many volunteers are specifically trained in the areas they work, such as medicine, education, or emergency rescue. Others serve ...
, known as
Wikipedians The Wikipedia community, collectively known colloquially as Wikipedians, is an informal community that volunteers to create and maintain Wikipedia, an online encyclopedia. Since August 2012, the word "Wikipedian" has been an '' Oxford Diction ...
, through
open collaboration Open collaboration is any "system of innovation or production that relies on goal-oriented yet loosely coordinated participants who interact to create a product (or service) of economic value, which is made available to contributors and noncontribu ...
and using a
wiki A wiki ( ) is an online hypertext publication collaboratively edited and managed by its own audience, using a web browser. A typical wiki contains multiple pages for the subjects or scope of the project, and could be either open to the pu ...
-based editing system. Wikipedia is the largest and most-read
reference work A reference work is a work, such as a paper, book or periodical (or their electronic equivalents), to which one can refer for information. The information is intended to be found quickly when needed. Such works are usually ''referred'' to f ...
in history. It is consistently one of the 10 most popular websites ranked by
Similarweb SimilarWeb Ltd. is an Israeli web analytics company specializing in web traffic and performance. Headquartered in Tel Aviv, the company has 12 offices worldwide. Similarweb went public on the New York Stock Exchange in May 2021. History The c ...
and formerly
Alexa Alexa may refer to: Technology *Amazon Alexa, a virtual assistant developed by Amazon * Alexa Internet, a defunct website ranking and traffic analysis service * Arri Alexa, a digital motion picture camera People *Alexa (name), a given name and ...
; Wikipedia was ranked the 5th most popular site in the world. It is hosted by the
Wikimedia Foundation The Wikimedia Foundation, Inc., or Wikimedia for short and abbreviated as WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California and registered as a charitable foundation under local laws. Best kno ...
, an American non-profit organization funded mainly through donations. Wikipedia was launched by
Jimmy Wales Jimmy Donal Wales (born August 7, 1966), also known on Wikipedia by the pseudonym Jimbo, is an American-British Internet entrepreneur, webmaster, and former financial trader. He is a co-founder of the online non-profit encyclopedia Wikipedi ...
and
Larry Sanger Lawrence Mark Sanger (; born July 16, 1968) is an American Internet project developer and philosopher who co-founded the online encyclopedia Wikipedia along with Jimmy Wales. Sanger coined the name and wrote much of Wikipedia's original governin ...
on January 15, 2001. Sanger coined its name as a
blend A blend is a mixture of two or more different things or substances; e.g., a product of a mixer or blender. Blend Blend may also refer to: * Blend word, a word formed from parts of other words * ''Blend'' (album), a 1996 album by BoDeans * ...
of ''wiki'' and ''
encyclopedia An encyclopedia (American English) or encyclopædia (British English) is a reference work or compendium providing summaries of knowledge either general or special to a particular field or discipline. Encyclopedias are divided into articles ...
''. Wales was influenced by the "
spontaneous order Spontaneous order, also named self-organization in the hard sciences, is the spontaneous emergence of order out of seeming chaos. The term "self-organization" is more often used for physical changes and biological processes, while "spontaneous o ...
" ideas associated with
Friedrich Hayek Friedrich August von Hayek ( , ; 8 May 189923 March 1992), often referred to by his initials F. A. Hayek, was an Austrian–British economist, legal theorist and philosopher who is best known for his defense of classical liberalism. Haye ...
and the
Austrian School The Austrian School is a heterodox school of economic thought that advocates strict adherence to methodological individualism, the concept that social phenomena result exclusively from the motivations and actions of individuals. Austrian school ...
of economics after being exposed to these ideas by the
libertarian Libertarianism (from french: libertaire, "libertarian"; from la, libertas, "freedom") is a political philosophy that upholds liberty as a core value. Libertarians seek to maximize autonomy and political freedom, and minimize the state's e ...
economist
Mark Thornton Mark Thornton (born June 7, 1960) is an American economist of the Austrian School. DiLorenzo, Thomas (2011-02-11My Associations with Liars, Bigots, and Murderers ''LewRockwell.com'' He has written on the topic of prohibition of drugs, the econo ...
. Initially available only in
English English usually refers to: * English language * English people English may also refer to: Peoples, culture, and language * ''English'', an adjective for something of, from, or related to England ** English national ide ...
, versions in other languages were quickly developed. Its combined editions comprise more than articles, attracting around 2billion unique device visits per month and more than 17 million edits per month (1.9edits per second) . In 2006, ''
Time Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. It is a component quantity of various measurements used to sequence events, to ...
'' magazine stated that the policy of allowing anyone to edit had made Wikipedia the "biggest (and perhaps best) encyclopedia in the world". Wikipedia has been praised for its enablement of the
democratization of knowledge The democratization of knowledge is the acquisition and spread of knowledge amongst a wider part of the population, not just privileged elites such as clergy and academics. Libraries, in particular public libraries, and modern digital technolog ...
, extent of coverage, unique structure, culture, and reduced degree of commercial bias; but
criticism Criticism is the construction of a judgement about the negative qualities of someone or something. Criticism can range from impromptu comments to a written detailed response. , ''"the act of giving your opinion or judgment about the good or bad q ...
for exhibiting
systemic bias Systemic bias, also called institutional bias, and related to structural bias, is the inherent tendency of a process to support particular outcomes. The term generally refers to human systems such as institutions. Institutional bias and structur ...
, particularly
gender bias Sexism is prejudice or discrimination based on one's sex or gender. Sexism can affect anyone, but it primarily affects women and girls.There is a clear and broad consensus among academic scholars in multiple fields that sexism refers primaril ...
against women and alleged ideological bias. The
reliability Reliability, reliable, or unreliable may refer to: Science, technology, and mathematics Computing * Data reliability (disambiguation), a property of some disk arrays in computer storage * High availability * Reliability (computer networking), a ...
of Wikipedia was frequently criticized in the 2000s, but has improved over time, as Wikipedia has been generally praised in the late 2010s and early 2020s. The website's coverage of controversial topics such as
American politics The politics of the United States function within a framework of a constitutional federal republic and presidential system, with three distinct branches that Separation of powers, share powers. These are: the United States Congress, U.S. Congre ...
and major events like the
COVID-19 pandemic The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing global pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The novel virus was first identif ...
and the
Russian invasion of Ukraine On 24 February 2022, in a major escalation of the Russo-Ukrainian War, which began in 2014. The invasion has resulted in tens of thousands of deaths on both sides. It has caused Europe's largest refugee crisis since World War II. An ...
has received substantial media attention. It has been
censored Censorship is the suppression of speech, public communication, or other information. This may be done on the basis that such material is considered objectionable, harmful, sensitive, or "inconvenient". Censorship can be conducted by governments ...
by world governments, ranging from specific pages to the entire site. In April 2018,
Facebook Facebook is an online social media and social networking service owned by American company Meta Platforms. Founded in 2004 by Mark Zuckerberg with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin M ...
and
YouTube YouTube is a global online video platform, online video sharing and social media, social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by ...
announced that they would help users detect
fake news Fake news is false or misleading information presented as news. Fake news often has the aim of damaging the reputation of a person or entity, or making money through advertising revenue.Schlesinger, Robert (April 14, 2017)"Fake news in reality ...
by suggesting fact-checking links to related Wikipedia articles. Articles on
breaking news Breaking news, interchangeably termed late-breaking news and also known as a special report or special coverage or news flash, is a current issue that broadcasters feel warrants the interruption of scheduled programming or current news in orde ...
are often accessed as a source of frequently updated information about those events.


History


Nupedia

Various collaborative online encyclopedias were attempted before the start of Wikipedia, but with limited success. Wikipedia began as a complementary project for
Nupedia Nupedia was an English-language, online encyclopedia whose articles were written by volunteer contributors with appropriate subject matter expertise, reviewed by expert editors before publication, and licensed as free content. It was founded by ...
, a free online English-language encyclopedia project whose articles were written by experts and reviewed under a formal process. It was founded on March 9, 2000, under the ownership of
Bomis Bomis ( to rhyme with "promise") was a dot-com company best known for supporting the creations of free-content online-encyclopedia projects Nupedia and Wikipedia. It was co-founded in 1996 by Jimmy Wales, Tim Shell, and Michael Davis. ...
, a
web portal A web portal is a specially designed website that brings information from diverse sources, like emails, online forums and search engines, together in a uniform way. Usually, each information source gets its dedicated area on the page for displayin ...
company. Its main figures were Bomis CEO
Jimmy Wales Jimmy Donal Wales (born August 7, 1966), also known on Wikipedia by the pseudonym Jimbo, is an American-British Internet entrepreneur, webmaster, and former financial trader. He is a co-founder of the online non-profit encyclopedia Wikipedi ...
and
Larry Sanger Lawrence Mark Sanger (; born July 16, 1968) is an American Internet project developer and philosopher who co-founded the online encyclopedia Wikipedia along with Jimmy Wales. Sanger coined the name and wrote much of Wikipedia's original governin ...
,
editor-in-chief An editor-in-chief (EIC), also known as lead editor or chief editor, is a publication's editorial leader who has final responsibility for its operations and policies. The highest-ranking editor of a publication may also be titled editor, managing ...
for Nupedia and later Wikipedia. Nupedia was initially licensed under its own Nupedia Open Content License, but before Wikipedia was founded, Nupedia switched to the
GNU Free Documentation License The GNU Free Documentation License (GNU FDL or simply GFDL) is a copyleft license for free documentation, designed by the Free Software Foundation (FSF) for the GNU Project. It is similar to the GNU General Public License, giving readers the r ...
at the urging of
Richard Stallman Richard Matthew Stallman (; born March 16, 1953), also known by his initials, rms, is an American free software movement activist and programmer. He campaigns for software to be distributed in such a manner that its users have the freedom to ...
. Wales is credited with defining the goal of making a publicly editable encyclopedia, while Sanger is credited with the strategy of using a
wiki A wiki ( ) is an online hypertext publication collaboratively edited and managed by its own audience, using a web browser. A typical wiki contains multiple pages for the subjects or scope of the project, and could be either open to the pu ...
to reach that goal. On January 10, 2001, Sanger proposed on the Nupedia mailing list to create a wiki as a "feeder" project for Nupedia.


Launch and growth

The
domain Domain may refer to: Mathematics *Domain of a function, the set of input values for which the (total) function is defined **Domain of definition of a partial function **Natural domain of a partial function **Domain of holomorphy of a function * Do ...
s ''wikipedia.com'' (later redirecting to ''wikipedia.org'') and ''wikipedia.org'' were registered on January 12, 2001, and January 13, 2001, respectively, and Wikipedia was launched on January 15, 2001, as a single English-language edition at www.wikipedia.com, and announced by Sanger on the Nupedia mailing list. Its integral policy of "neutral point-of-view" was codified in its first few months. Otherwise, there were initially relatively few rules, and it operated independently of Nupedia. Bomis originally intended it as a business for profit. Wikipedia gained early contributors from Nupedia, ''
Slashdot ''Slashdot'' (sometimes abbreviated as ''/.'') is a social news website that originally advertised itself as "News for Nerds. Stuff that Matters". It features news stories concerning science, technology, and politics that are submitted and evalu ...
'' postings, and web
search engine A search engine is a software system designed to carry out web searches. They search the World Wide Web in a systematic way for particular information specified in a textual web search query. The search results are generally presented in a ...
indexing. Language editions were created beginning in March 2001, with a total of 161 in use by the end of 2004. Nupedia and Wikipedia coexisted until the former's servers were taken down permanently in 2003, and its text was incorporated into Wikipedia. The
English Wikipedia The English Wikipedia is, along with the Simple English Wikipedia, one of two English-language editions of Wikipedia, an online encyclopedia. It was founded on January 15, 2001, as Wikipedia's first edition, and, as of , has the most arti ...
passed the mark of two million articles on September 9, 2007, making it the largest encyclopedia ever assembled, surpassing the ''
Yongle Encyclopedia The ''Yongle Encyclopedia'' () or ''Yongle Dadian'' () is a largely-lost Chinese ''leishu'' encyclopedia commissioned by the Yongle Emperor of the Ming dynasty in 1403 and completed by 1408. It comprised 22,937 manuscript rolls or chapters, in 1 ...
'' made during the
Ming Dynasty The Ming dynasty (), officially the Great Ming, was an Dynasties in Chinese history, imperial dynasty of China, ruling from 1368 to 1644 following the collapse of the Mongol Empire, Mongol-led Yuan dynasty. The Ming dynasty was the last ort ...
in 1408, which had held the record for almost 600 years. Citing fears of commercial
advertising Advertising is the practice and techniques employed to bring attention to a product or service. Advertising aims to put a product or service in the spotlight in hopes of drawing it attention from consumers. It is typically used to promote a ...
and lack of control, users of the
Spanish Wikipedia The Spanish Wikipedia ( es, Wikipedia en español) is a Spanish-language edition of Wikipedia, a free online encyclopedia. It has articles. Started in May 2001, it reached 100,000 articles on March 8, 2006 and 1,000,000 articles on May 16, 2013 ...
fork In cutlery or kitchenware, a fork (from la, furca 'pitchfork') is a utensil, now usually made of metal, whose long handle terminates in a head that branches into several narrow and often slightly curved tines with which one can spear foods ei ...
ed from Wikipedia to create
Enciclopedia Libre Enciclopedia (in Spanish and Italian), or enciclopédia (in Portuguese), means the English word encyclopedia. Enciclopedia may refer to: *'' Enciclopedia universal ilustrada europeo-americana'' (1908-) *''Enciclopedia Italiana'' or ''Treccani'' ( ...
in February 2002. Wales then announced that Wikipedia would not display advertisements, and changed Wikipedia's domain from ''wikipedia.com'' to ''wikipedia.org''. Though the English Wikipedia reached three million articles in August 2009, the growth of the edition, in terms of the numbers of new articles and of editors, appears to have peaked around early 2007. Around 1,800 articles were added daily to the encyclopedia in 2006; by 2013 that average was roughly 800. A team at the
Palo Alto Research Center PARC (Palo Alto Research Center; formerly Xerox PARC) is a research and development company in Palo Alto, California. Founded in 1969 by Jacob E. "Jack" Goldman, chief scientist of Xerox Corporation, the company was originally a division of Xero ...
attributed this slowing of growth to the project's increasing exclusivity and resistance to change. Others suggest that the growth is flattening naturally because articles that could be called "
low-hanging fruit The following terms are in everyday use in financial regions, such as commercial business and the management of large organisations such as corporations. Noun phrases Verb phrases See also * Buzzwords * Corporate communication * Corpora ...
"—topics that clearly merit an article—have already been created and built up extensively. In November 2009, a researcher at the
Rey Juan Carlos University Rey Juan Carlos University ( es, Universidad Rey Juan Carlos, URJC) is a Spanish public research university located in the southern area of the Community of Madrid (Spain), with five campuses at Móstoles, Alcorcón, Vicálvaro, Aranjuez and Fu ...
in
Madrid Madrid ( , ) is the capital and most populous city of Spain. The city has almost 3.4 million inhabitants and a metropolitan area population of approximately 6.7 million. It is the second-largest city in the European Union (EU), and ...
found that the English Wikipedia had lost 49,000 editors during the first three months of 2009; in comparison, it lost only 4,900 editors during the same period in 2008. ''The Wall Street Journal'' cited the array of rules applied to editing and disputes related to such content among the reasons for this trend.Volunteers Log Off as Wikipedia Ages, The Wall Street Journal, November 27, 2009. Wales disputed these claims in 2009, denying the decline and questioning the study's methodology. Two years later, in 2011, he acknowledged a slight decline, noting a decrease from "a little more than 36,000 writers" in June 2010 to 35,800 in June 2011. In the same interview, he also claimed the number of editors was "stable and sustainable". A 2013 ''
MIT Technology Review ''MIT Technology Review'' is a bimonthly magazine wholly owned by the Massachusetts Institute of Technology, and editorially independent of the university. It was founded in 1899 as ''The Technology Review'', and was re-launched without "The" in ...
'' article, "The Decline of Wikipedia", questioned this claim, revealing that since 2007, Wikipedia had lost a third of its volunteer editors, and that those remaining had focused increasingly on minutiae. In July 2012, ''
The Atlantic ''The Atlantic'' is an American magazine and multi-platform publisher. It features articles in the fields of politics, foreign affairs, business and the economy, culture and the arts, technology, and science. It was founded in 1857 in Boston, ...
'' reported that the number of administrators was also in decline. In the November 25, 2013, issue of ''
New York New York most commonly refers to: * New York City, the most populous city in the United States, located in the state of New York * New York (state), a state in the northeastern United States New York may also refer to: Film and television * '' ...
'' magazine, Katherine Ward stated, "Wikipedia, the sixth-most-used website, is facing an internal crisis." The number of active English Wikipedia editors has since remained steady after a long period of decline.


Milestones

In January 2007, Wikipedia first became one of the ten most popular websites in the United States, according to Comscore Networks. With 42.9 million unique visitors, it was ranked #9, surpassing ''
The New York Times ''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid ...
'' (#10) and
Apple An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple fruit tree, trees are agriculture, cultivated worldwide and are the most widely grown species in the genus ''Malus''. The tree originated in Central Asia, wh ...
(#11). This marked a significant increase over January 2006, when Wikipedia ranked 33rd, with around 18.3 million unique visitors. , it ranked 13th in popularity according to
Alexa Internet Alexa Internet, Inc. was an American web traffic analysis company based in San Francisco. It was a wholly-owned subsidiary of Amazon. Alexa was founded as an independent company in 1996 and acquired by Amazon in 1999 for $250 million in stock. ...
. In 2014, it received eight billion page views every month. On February 9, 2014, ''
The New York Times ''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid ...
'' reported that Wikipedia had 18 billion
page view In web analytics and website management, a pageview or page view, abbreviated in business to PV and occasionally called page impression, is a request to load a single HTML file ( web page) of an Internet site. On the World Wide Web, a page request ...
s and nearly 500 million
unique visitor Website popularity is commonly determined using the number of unique users, and the metric is often quoted to potential advertisers or investors. A website's number of unique users is usually measured over a standard period of time, typically a m ...
s a month, "according to the ratings firm comScore". Loveland and Reagle argue that, in process, Wikipedia follows a long tradition of historical encyclopedias that have accumulated improvements piecemeal through " stigmergic accumulation". On January 18, 2012, the English Wikipedia participated in a series of coordinated protests against two proposed laws in the
United States Congress The United States Congress is the legislature of the federal government of the United States. It is bicameral, composed of a lower body, the House of Representatives, and an upper body, the Senate. It meets in the U.S. Capitol in Washing ...
—the
Stop Online Piracy Act The Stop Online Piracy Act (SOPA) was a controversial proposed United States congressional bill to expand the ability of U.S. law enforcement to combat online copyright infringement and online trafficking in counterfeit goods. Introduced on Oc ...
(SOPA) and the PROTECT IP Act (PIPA)—by blacking out its pages for 24 hours. More than 162 million people viewed the blackout explanation page that temporarily replaced its content. On January 20, 2014, Subodh Varma reporting for ''
The Economic Times ''The Economic Times'' is an Indian English-language business-focused daily newspaper. It is owned by The Times Group. ''The Economic Times'' began publication in 1961. As of 2012, it is the world's second-most widely read English-language bus ...
'' indicated that not only had Wikipedia's growth stalled, it "had lost nearly ten percent of its page views last year. There was a decline of about two billion between December 2012 and December 2013. Its most popular versions are leading the slide: page-views of the English Wikipedia declined by twelve percent, those of German version slid by 17 percent and the Japanese version lost nine percent." Varma added, "While Wikipedia's managers think that this could be due to errors in counting, other experts feel that Google's
Knowledge Graph The Google Knowledge Graph is a knowledge base from which Google serves relevant information in an infobox beside its search results. This allows the user to see the answer in a glance. The data is generated automatically from a variety of so ...
s project launched last year may be gobbling up Wikipedia users." When contacted on this matter,
Clay Shirky Clay Shirky (born 1964) is an American writer, consultant and teacher on the social and economic effects of Internet technologies and journalism. In 2017 he was appointed Vice Provost of Educational Technologies of New York University (NYU), aft ...
, associate professor at New York University and fellow at Harvard's
Berkman Klein Center for Internet & Society The Berkman Klein Center for Internet & Society is a research center at Harvard University that focuses on the study of cyberspace. Founded at Harvard Law School, the center traditionally focused on internet-related legal issues. On May 15, 2008, ...
said that he suspected much of the page-view decline was due to Knowledge Graphs, stating, "If you can get your question answered from the search page, you don't need to click
ny further NY most commonly refers to: * New York (state), a state in the Northeastern United States * New York City, the most populous city in the United States, located in the state of New York NY, Ny or ny may also refer to: Places * North Yorkshire, ...
" By the end of December 2016, Wikipedia was ranked the fifth most popular website globally. In January 2013, 274301 Wikipedia, an
asteroid An asteroid is a minor planet of the inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic or icy bodies with no atmosphere. ...
, was named after Wikipedia; in October 2014, Wikipedia was honored with the ''
Wikipedia Monument The ''Wikipedia Monument'' ( pl, Pomnik Wikipedii), located in Słubice, Poland, is a statue designed by Armenian sculptor Mihran Hakobyan honoring Wikipedia contributors. It was unveiled in Frankfurt Square (Plac Frankfurcki) on 22 October ...
''; and, in July 2015, 106 of the 7,473 700-page volumes of Wikipedia became available as Print Wikipedia. In April 2019, an Israeli
lunar lander A lunar lander or Moon lander is a spacecraft designed to land on the surface of the Moon. As of 2021, the Apollo Lunar Module is the only lunar lander to have ever been used in human spaceflight, completing six lunar landings from 1969 to 19 ...
,
Beresheet ''Beresheet'' ( he, בְּרֵאשִׁית, ''Bərēšīṯ'', "In the beginning"; Book of Genesis) was a demonstrator of a small robotic lunar lander and lunar probe operated by SpaceIL and Israel Aerospace Industries. Its aims included insp ...
, crash landed on the surface of the
Moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...
carrying a copy of nearly all of the English Wikipedia engraved on thin nickel plates; experts say the plates likely survived the crash. In June 2019, scientists reported that all 16 GB of article text from the English Wikipedia had been encoded into synthetic DNA. As of November 2022, 55,800 Wikipedia English articles have been cited 92,300 times in scholarly journals, from which
cloud computing Cloud computing is the on-demand availability of computer system resources, especially data storage ( cloud storage) and computing power, without direct active management by the user. Large clouds often have functions distributed over mul ...
was the most cited page.


Openness

Unlike traditional encyclopedias, Wikipedia follows the
procrastination Procrastination is the action of unnecessarily and voluntarily delaying or postponing something despite knowing that there will be negative consequences for doing so. The word has originated from the Latin word ''procrastinatus'', which itself evo ...
principleThe procrastination principle dictates that one should wait for problems to arise before solving them. regarding the security of its content.


Restrictions

Due to Wikipedia's increasing popularity, some editions, including the English version, have introduced editing restrictions for certain cases. For instance, on the English Wikipedia and some other language editions, only registered users may create a new article. On the English Wikipedia, among others, particularly controversial, sensitive or vandalism-prone pages have been protected to varying degrees. A frequently vandalized article can be "semi-protected" or "extended confirmed protected", meaning that only "autoconfirmed" or "extended confirmed" editors can modify it. A particularly contentious article may be locked so that only
administrators Administrator or admin may refer to: Job roles Computing and internet * Database administrator, a person who is responsible for the environmental aspects of a database * Forum administrator, one who oversees discussions on an Internet forum * N ...
can make changes. A 2021 article in the ''
Columbia Journalism Review The ''Columbia Journalism Review'' (''CJR'') is a biannual magazine for professional journalists that has been published by the Columbia University Graduate School of Journalism since 1961. Its contents include news and media industry trends, ana ...
'' identified Wikipedia's page-protection policies as "perhaps the most important" means at its disposal to "regulate its market of ideas". In certain cases, all editors are allowed to submit modifications, but review is required for some editors, depending on certain conditions. For example, the
German Wikipedia The German Wikipedia (german: Deutschsprachige Wikipedia) is the German-language edition of Wikipedia, a free and publicly editable online encyclopedia. Founded on March 16, 2001, it is the second-oldest Wikipedia (after the English Wikipedia), ...
maintains "stable versions" of articles which have passed certain reviews. Following protracted trials and community discussion, the English Wikipedia introduced the "pending changes" system in December 2012. Under this system, new and unregistered users' edits to certain controversial or vandalism-prone articles are reviewed by established users before they are published.


Review of changes

Although changes are not systematically reviewed, the software that powers Wikipedia provides tools allowing anyone to review changes made by others. Each article's History page links to each revision.Revisions with libelous content, criminal threats, or copyright infringements may be removed completely. On most articles, anyone can undo others' changes by clicking a link on the article's History page. Anyone can view the latest changes to articles, and anyone registered may maintain a "watchlist" of articles that interest them so they can be notified of changes. "New pages patrol" is a process where newly created articles are checked for obvious problems. In 2003, economics Ph.D. student Andrea Ciffolilli argued that the low
transaction cost In economics and related disciplines, a transaction cost is a cost in making any economic trade when participating in a market. Oliver E. Williamson defines transaction costs as the costs of running an economic system of companies, and unlike produ ...
s of participating in a
wiki A wiki ( ) is an online hypertext publication collaboratively edited and managed by its own audience, using a web browser. A typical wiki contains multiple pages for the subjects or scope of the project, and could be either open to the pu ...
created a catalyst for collaborative development, and that features such as allowing easy access to past versions of a page favored "creative construction" over "creative destruction".


Vandalism

Any change or edit that manipulates content in a way that deliberately compromises Wikipedia's integrity is considered vandalism. The most common and obvious types of vandalism include additions of obscenities and crude humor; it can also include advertising and other types of spam. Sometimes editors commit vandalism by removing content or entirely blanking a given page. Less common types of vandalism, such as the deliberate addition of plausible but false information, can be more difficult to detect. Vandals can introduce irrelevant formatting, modify page semantics such as the page's title or categorization, manipulate the article's underlying code, or use images disruptively. Obvious vandalism is generally easy to remove from Wikipedia articles; the median time to detect and fix it is a few minutes. However, some vandalism takes much longer to detect and repair. In the
Seigenthaler biography incident In May 2005, an unregistered editor posted a hoax article onto Wikipedia about journalist John Seigenthaler. The article falsely stated that Seigenthaler had been a suspect in the assassinations of U.S. President John F. Kennedy and U.S. Attor ...
, an anonymous editor introduced false information into the biography of American political figure
John Seigenthaler John Lawrence Seigenthaler ( ; July 27, 1927 – July 11, 2014) was an American journalist, writer, and political figure. He was known as a prominent defender of First Amendment rights. Seigenthaler joined the Nashville newspaper ''The ...
in May 2005, falsely presenting him as a suspect in the
assassination of John F. Kennedy John F. Kennedy, the 35th president of the United States, was assassinated on Friday, November 22, 1963, at 12:30 p.m. CST in Dallas, Texas, while riding in a presidential motorcade through Dealey Plaza. Kennedy was in the vehicle with ...
. It remained uncorrected for four months. Seigenthaler, the founding editorial director of ''
USA Today ''USA Today'' (stylized in all uppercase) is an American daily middle-market newspaper and news broadcasting company. Founded by Al Neuharth on September 15, 1982, the newspaper operates from Gannett's corporate headquarters in Tysons, Virgini ...
'' and founder of the
Freedom Forum The Freedom Forum is the creator of the Newseum in Washington, D.C., which it sold to Johns Hopkins University in 2019. It is a nonpartisan 501 (c)(3) foundation that advances First Amendment freedoms through initiatives that include the Power Shif ...
First Amendment Center The First Amendment Center supports the First Amendment and builds understanding of its core freedoms through education, information and entertainment. The center serves as a forum for the study and exploration of free-expression issues, includin ...
at
Vanderbilt University Vanderbilt University (informally Vandy or VU) is a private research university in Nashville, Tennessee. Founded in 1873, it was named in honor of shipping and rail magnate Cornelius Vanderbilt, who provided the school its initial $1-million ...
, called Wikipedia co-founder Jimmy Wales and asked whether he had any way of knowing who contributed the misinformation. Wales said he did not, although the perpetrator was eventually traced. After the incident, Seigenthaler described Wikipedia as "a flawed and irresponsible research tool". The incident led to policy changes at Wikipedia for tightening up the verifiability of biographical articles of living people. In 2010, Daniel Tosh encouraged viewers of his show, ''
Tosh.0 ''Tosh.0'' ( ) is an American television series that aired on Comedy Central from June 4, 2009, to November 24, 2020. The series is hosted and produced by comedian Daniel Tosh, who provides satirical commentary on online viral video clips, inter ...
'', to visit the show's Wikipedia article and edit it at will. On a later episode, he commented on the edits to the article, most of them offensive, which had been made by the audience and had prompted the article to be locked from editing.


Edit warring

Wikipedians often have disputes regarding content, which may result in repeated competing changes to an article, known as "edit warring". It is widely seen as a resource-consuming scenario where no useful knowledge is added, and criticized as creating a competitive and conflict-based editing culture associated with traditional masculine
gender role A gender role, also known as a sex role, is a social role encompassing a range of behaviors and attitudes that are generally considered acceptable, appropriate, or desirable for a person based on that person's sex. Gender roles are usually cent ...
s.


Policies and laws

Content in Wikipedia is subject to the laws (in particular,
copyright A copyright is a type of intellectual property that gives its owner the exclusive right to copy, distribute, adapt, display, and perform a creative work, usually for a limited time. The creative work may be in a literary, artistic, education ...
laws) of the United States and of the US state of
Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...
, where the majority of Wikipedia's servers are located. By using the site, one agrees to the Wikimedia Foundation Terms of Use and
Privacy Policy A privacy policy is a statement or legal document (in privacy law) that discloses some or all of the ways a party gathers, uses, discloses, and manages a customer or client's data. Personal information can be anything that can be used to identif ...
; some of the main rules are that contributors are legally responsible for their edits and contributions, that they should follow the policies that govern each of the independent project editions. and they may not engage in activities, whether legal or illegal, that may be harmful to other users. In addition to the terms, the Foundation has developed policies, described as the ''official policies of the Wikimedia Foundation''. The editorial principles of the Wikipedia community are embodied in the "Five pillars" and in numerous policies and guidelines intended to appropriately shape content. The rules developed by the community are stored in wiki form, and Wikipedia editors write and revise the website's policies and guidelines. Editors can by deleting or modifying non-compliant material. Originally, rules on the non-English editions of Wikipedia were based on a translation of the rules for the English Wikipedia. They have since diverged to some extent.


Content policies and guidelines

According to the rules on the English Wikipedia community, each entry in Wikipedia must be about a topic that is
encyclopedic An encyclopedia (American English) or encyclopædia (British English) is a reference work or compendium providing summaries of knowledge either general or special to a particular field or discipline. Encyclopedias are divided into articles ...
and is not a dictionary entry or dictionary-style.. Retrieved April 1, 2010. "Wikipedia is not a dictionary, usage, or jargon guide." A topic should also meet Wikipedia's standards of "notability",. Retrieved February 13, 2008. "A topic is presumed to be notable if it has received significant coverage in reliable secondary sources that are independent of the subject." which generally means that the topic must have been covered in mainstream media or major academic journal sources that are independent of the article's subject. Further, Wikipedia intends to convey only knowledge that is already established and recognized. It must not present original research. A claim that is likely to be challenged requires a reference to a reliable source, as do all quotations. Among Wikipedia editors, this is often phrased as "verifiability, not truth" to express the idea that the readers, not the encyclopedia, are ultimately responsible for checking the truthfulness of the articles and making their own interpretations.. February 13, 2008. "Material challenged or likely to be challenged, and all quotations must be attributed to a reliable, published source." This can at times lead to the removal of information that, though valid, is not properly sourced. Finally, Wikipedia must not take sides.


Governance

Wikipedia's initial
anarchy Anarchy is a society without a government. It may also refer to a society or group of people that entirely rejects a set hierarchy. ''Anarchy'' was first used in English in 1539, meaning "an absence of government". Pierre-Joseph Proudhon adopted ...
integrated democratic and hierarchical elements over time. An article is not considered to be owned by its creator or any other editor, nor by the subject of the article.


Administrators

Editors in good standing in the community can request extra user rights, granting them the technical ability to perform certain special actions. In particular, editors can choose to run for " adminship", which includes the ability to delete pages or prevent them from being changed in cases of severe vandalism or editorial disputes. Administrators are not supposed to enjoy any special privilege in decision-making; instead, their powers are mostly limited to making edits that have project-wide effects and thus are disallowed to ordinary editors, and to implement restrictions intended to prevent disruptive editors from making unproductive edits. By 2012, fewer editors were becoming administrators compared to Wikipedia's earlier years, in part because the process of vetting potential administrators had become more rigorous. In 2022, there was a particularly contentious request for adminship over the candidate's anti-Trump views; ultimately, they were granted adminship.


Dispute resolution

Over time, Wikipedia has developed a semiformal dispute resolution process. To determine community consensus, editors can raise issues at appropriate community forums, seek outside input through third opinion requests, or initiate a more general community discussion known as a "request for comment". Wikipedia encourages local resolutions of conflicts, which Jemielniak argues is quite unique in organization studies, though there has been some recent interest in consensus building in the field.
Joseph Reagle Joseph Michael Reagle Jr. (born 1972) is an American academic and author focused on digital technology and culture, including Wikipedia, online comments, geek feminism, and life hacking. He is Associate Professor of Communication Studies at North ...
and
Sue Gardner Sue Gardner (born May 11, 1967) is a Canadian journalist, not-for-profit executive and business executive. She was the executive director of the Wikimedia Foundation from December 2007 until May 2014, and before that was the director of the Can ...
argue that the approaches to consensus building are similar to those used by
Quakers Quakers are people who belong to a historically Protestant Christian set of denominations known formally as the Religious Society of Friends. Members of these movements ("theFriends") are generally united by a belief in each human's abil ...
. A difference from Quaker meetings is the absence of a
facilitator A facilitator is a person who helps a group of people to work together better, understand their common objectives, and plan how to achieve these objectives, during meetings or discussions. In doing so, the facilitator remains "neutral", meaning t ...
in the presence of disagreement, a role played by the clerk in Quaker meetings.


Arbitration Committee

The Arbitration Committee presides over the ultimate dispute resolution process. Although disputes usually arise from a disagreement between two opposing views on how an article should read, the Arbitration Committee explicitly refuses to directly rule on the specific view that should be adopted. Statistical analyses suggest that the committee ignores the content of disputes and rather focuses on the way disputes are conducted, functioning not so much to resolve disputes and make peace between conflicting editors, but to weed out problematic editors while allowing potentially productive editors back in to participate. Therefore, the committee does not dictate the content of articles, although it sometimes condemns content changes when it deems the new content violates Wikipedia policies (for example, if the new content is considered biased). Its remedies include cautions and probations (used in 63% of cases) and banning editors from articles (43%), subject matters (23%), or Wikipedia (16%). Complete bans from Wikipedia are generally limited to instances of impersonation and
anti-social behavior Antisocial behavior is a behavior that is defined as the violation of the rights of others by committing crime, such as stealing and physical attack in addition to other behaviors such as lying and manipulation. It is considered to be disrupti ...
. When conduct is not impersonation or anti-social, but rather anti-consensus or in violation of editing policies, remedies tend to be limited to warnings.


Community

Each article and each user of Wikipedia has an associated and dedicated "talk" page. These form the primary communication channel for editors to discuss, coordinate and debate. Wikipedia's community has been described as
cult In modern English, ''cult'' is usually a pejorative term for a social group that is defined by its unusual religious, spiritual, or philosophical beliefs and rituals, or its common interest in a particular personality, object, or goal. This ...
like, although not always with entirely negative connotations. Its preference for cohesiveness, even if it requires compromise that includes disregard of credentials, has been referred to as "
anti-elitism Elitism is the belief or notion that individuals who form an elite—a select group of people perceived as having an intrinsic quality, high intellect, wealth, power, notability, special skills, or experience—are more likely to be constructiv ...
". Wikipedians sometimes award one another "virtual barnstars" for good work. These personalized tokens of appreciation reveal a wide range of valued work extending far beyond simple editing to include social support, administrative actions, and types of articulation work. Wikipedia does not require that its editors and contributors provide identification. As Wikipedia grew, "Who writes Wikipedia?" became one of the questions frequently asked there. Jimmy Wales once argued that only "a community ... a dedicated group of a few hundred volunteers" makes the bulk of contributions to Wikipedia and that the project is therefore "much like any traditional organization". In 2008, a ''Slate'' magazine article reported that: "According to researchers in Palo Alto, one percent of Wikipedia users are responsible for about half of the site's edits." This method of evaluating contributions was later disputed by
Aaron Swartz Aaron Hillel Swartz (November 8, 1986 – January 11, 2013) was an American computer programmer, entrepreneur, writer, political organizer, and Internet hacktivist. A prolific programmer, Swartz helped develop the web feed format RSS, the tech ...
, who noted that several articles he sampled had large portions of their content (measured by number of characters) contributed by users with low edit counts. The English Wikipedia has articles, registered editors, and active editors. An editor is considered active if they have made one or more edits in the past 30 days. Editors who fail to comply with Wikipedia cultural rituals, such as signing talk page comments, may implicitly signal that they are Wikipedia outsiders, increasing the odds that Wikipedia insiders may target or discount their contributions. Becoming a Wikipedia insider involves non-trivial costs: the contributor is expected to learn Wikipedia-specific technological codes, submit to a sometimes convoluted dispute resolution process, and learn a "baffling culture rich with in-jokes and insider references". Editors who do not log in are in some sense second-class citizens on Wikipedia, as "participants are accredited by members of the wiki community, who have a vested interest in preserving the quality of the work product, on the basis of their ongoing participation", but the contribution histories of anonymous unregistered editors recognized only by their
IP address An Internet Protocol address (IP address) is a numerical label such as that is connected to a computer network that uses the Internet Protocol for communication.. Updated by . An IP address serves two main functions: network interface ident ...
es cannot be attributed to a particular editor with certainty.


Studies

A 2007 study by researchers from
Dartmouth College Dartmouth College (; ) is a private research university in Hanover, New Hampshire. Established in 1769 by Eleazar Wheelock, it is one of the nine colonial colleges chartered before the American Revolution. Although founded to educate Native A ...
found that "anonymous and infrequent contributors to Wikipedia ... are as reliable a source of knowledge as those contributors who register with the site". Jimmy Wales stated in 2009 that " turns out over 50% of all the edits are done by just 0.7% of the users... 524 people... And in fact, the most active 2%, which is 1400 people, have done 73.4% of all the edits." However, ''
Business Insider ''Insider'', previously named ''Business Insider'' (''BI''), is an American financial and business news website founded in 2007. Since 2015, a majority stake in ''Business Insider''s parent company Insider Inc. has been owned by the German publ ...
'' editor and journalist
Henry Blodget Henry McKelvey Blodget (born 1966) is an American businessman, investor and journalist. He is notable for his former career as an equity research analyst who was senior Internet analyst for CIBC Oppenheimer and the head of the global Internet ...
showed in 2009 that in a random sample of articles, most Wikipedia content (measured by the amount of contributed text that survives to the latest sampled edit) is created by "outsiders", while most editing and formatting is done by "insiders". A 2008 study found that Wikipedians were less agreeable, open, and conscientious than others, although a later commentary pointed out serious flaws, including that the data showed higher openness and that the differences with the control group and the samples were small. According to a 2009 study, there is "evidence of growing resistance from the Wikipedia community to new content".


Diversity

Several studies have shown that most Wikipedia contributors are male. Notably, the results of a Wikimedia Foundation survey in 2008 showed that only 13 percent of Wikipedia editors were female. Because of this, universities throughout the United States tried to encourage women to become Wikipedia contributors. Similarly, many of these universities, including
Yale Yale University is a private research university in New Haven, Connecticut. Established in 1701 as the Collegiate School, it is the third-oldest institution of higher education in the United States and among the most prestigious in the wor ...
and
Brown Brown is a color. It can be considered a composite color, but it is mainly a darker shade of orange. In the CMYK color model used in printing or painting, brown is usually made by combining the colors orange and black. In the RGB color model used ...
, gave college credit to students who create or edit an article relating to women in science or technology.
Andrew Lih Andrew Lih (; born 1968)Andrew Lih
"
The New York Times ''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid ...
'' that the reason he thought the number of male contributors outnumbered the number of females so greatly was because identifying as a woman may expose oneself to "ugly, intimidating behavior". Data has shown that Africans are underrepresented among Wikipedia editors.


Language editions

There are currently language editions of Wikipedia (also called ''language versions'', or simply ''Wikipedias''). As of , the six largest, in order of article count, are the , , , , , and Wikipedias. The and -largest Wikipedias owe their position to the article-creating
bot Bot may refer to: Sciences Computing and technology * Chatbot, a computer program that converses in natural language * Internet bot, a software application that runs automated tasks (scripts) over the Internet **a Spambot, an internet bot des ...
Lsjbot Lsjbot is an automated Wikipedia article-creating program, or Wikipedia bot, developed by Sverker Johansson for the Swedish Wikipedia. The bot primarily focuses on articles about living organisms and geographical entities (such as rivers, dams, ...
, which had created about half the articles on the
Swedish Wikipedia The Swedish Wikipedia ( sv, Svenskspråkiga Wikipedia) is the Swedish-language edition of Wikipedia and was started on the 23 of May 2001. It is currently the largest Wikipedia by article count with its current articles, it has a ''Wikipedia ...
, and most of the articles in the Cebuano and
Waray Wikipedia The Waray Wikipedia is the Waray language edition of Wikipedia. It is hosted on servers run by the Wikimedia Foundation since 25 September 2005. As of , , this edition has articles and is the largest Wikipedia edition. Despite having very few ...
s. The latter are both languages of the Philippines. In addition to the top six, twelve other Wikipedias have more than a million articles each (, , , , , , , , , , and ), seven more have over 500,000 articles (, , , , , and ), 44 more have over 100,000, and 82 more have over 10,000. The largest, the English Wikipedia, has over million articles. the English Wikipedia receives 48% of Wikipedia's cumulative traffic, with the remaining split among the other languages. The top 10 editions represent approximately 85% of the total traffic. Since Wikipedia is based on the
Web Web most often refers to: * Spider web, a silken structure created by the animal * World Wide Web or the Web, an Internet-based hypertext system Web, WEB, or the Web may also refer to: Computing * WEB, a literate programming system created by ...
and therefore worldwide, contributors to the same language edition may use different dialects or may come from different countries (as is the case for the English edition). These differences may lead to some conflicts over
spelling differences Despite the various English dialects spoken from country to country and within different regions of the same country, there are only slight regional variations in English orthography, the two most notable variations being British and American ...
(e.g. ''colour'' versus ''
color Color (American English) or colour (British English) is the visual perceptual property deriving from the spectrum of light interacting with the photoreceptor cells of the eyes. Color categories and physical specifications of color are associ ...
'') or points of view. Though the various language editions are held to global policies such as "neutral point of view", they diverge on some points of policy and practice, most notably on whether images that are not licensed freely may be used under a claim of
fair use Fair use is a doctrine in United States law that permits limited use of copyrighted material without having to first acquire permission from the copyright holder. Fair use is one of the limitations to copyright intended to balance the interests ...
. Jimmy Wales has described Wikipedia as "an effort to create and distribute a free encyclopedia of the highest possible quality to every single person on the planet in their own language".
Jimmy Wales Jimmy Donal Wales (born August 7, 1966), also known on Wikipedia by the pseudonym Jimbo, is an American-British Internet entrepreneur, webmaster, and former financial trader. He is a co-founder of the online non-profit encyclopedia Wikipedi ...
, "Wikipedia is an encyclopedia", March 8, 2005, <Wikipedia-l@wikimedia.org>
Though each language edition functions more or less independently, some efforts are made to supervise them all. They are coordinated in part by Meta-Wiki, the Wikimedia Foundation's wiki devoted to maintaining all its projects (Wikipedia and others). For instance, Meta-Wiki provides important statistics on all language editions of Wikipedia, and it maintains a list of articles every Wikipedia should have. The list concerns basic content by subject: biography, history, geography, society, culture, science, technology, and mathematics. It is not rare for articles strongly related to a particular language not to have counterparts in another edition. For example, articles about small towns in the United States might be available only in English, even when they meet the notability criteria of other language Wikipedia projects. Translated articles represent only a small portion of articles in most editions, in part because those editions do not allow fully automated translation of articles. Articles available in more than one language may offer "interwiki links", which link to the counterpart articles in other editions. A study published by '' PLOS One'' in 2012 also estimated the share of contributions to different editions of Wikipedia from different regions of the world. It reported that the proportion of the edits made from North America was 51% for the
English Wikipedia The English Wikipedia is, along with the Simple English Wikipedia, one of two English-language editions of Wikipedia, an online encyclopedia. It was founded on January 15, 2001, as Wikipedia's first edition, and, as of , has the most arti ...
, and 25% for the
simple English Wikipedia The Simple English Wikipedia is a modified English-language edition of Wikipedia, a free online encyclopedia, written primarily in Basic English and Learning English. It is one of seven Wikipedias written in an Anglic language or English-based ...
.


English Wikipedia editor numbers

On March 1, 2014, ''
The Economist ''The Economist'' is a British weekly newspaper printed in demitab format and published digitally. It focuses on current affairs, international business, politics, technology, and culture. Based in London, the newspaper is owned by The Econo ...
'', in an article titled "The Future of Wikipedia", cited a trend analysis concerning data published by the Wikimedia Foundation stating that " e number of editors for the English-language version has fallen by a third in seven years." The attrition rate for active editors in English Wikipedia was cited by ''The Economist'' as substantially in contrast to statistics for Wikipedia in other languages (non-English Wikipedia). ''The Economist'' reported that the number of contributors with an average of five or more edits per month was relatively constant since 2008 for Wikipedia in other languages at approximately 42,000 editors within narrow seasonal variances of about 2,000 editors up or down. The number of active editors in English Wikipedia, by sharp comparison, was cited as peaking in 2007 at approximately 50,000 and dropping to 30,000 by the start of 2014. In contrast, the trend analysis for Wikipedia in other languages (non-English Wikipedia) shows success in retaining active editors on a renewable and sustained basis, with their numbers remaining relatively constant at approximately 42,000. No comment was made concerning which of the differentiated edit policy standards from Wikipedia in other languages (non-English Wikipedia) would provide a possible alternative to English Wikipedia for effectively ameliorating substantial editor attrition rates on the English-language Wikipedia.


Reception

Various
Wikipedians The Wikipedia community, collectively known colloquially as Wikipedians, is an informal community that volunteers to create and maintain Wikipedia, an online encyclopedia. Since August 2012, the word "Wikipedian" has been an '' Oxford Diction ...
have criticized Wikipedia's large and growing regulation, which includes more than fifty policies and nearly 150,000 words Critics have stated that Wikipedia exhibits
systemic bias Systemic bias, also called institutional bias, and related to structural bias, is the inherent tendency of a process to support particular outcomes. The term generally refers to human systems such as institutions. Institutional bias and structur ...
. In 2010, columnist and journalist
Edwin Black Edwin Black (born February 27, 1950) is an American historian and author, as well as a syndicated columnist, investigative journalist, and weekly talk show host on The Edwin Black Show. He specializes in human rights, the historical interplay be ...
described Wikipedia as being a mixture of "truth, half-truth, and some falsehoods". Articles in ''
The Chronicle of Higher Education ''The Chronicle of Higher Education'' is a newspaper and website that presents news, information, and jobs for college and university faculty and student affairs professionals (staff members and administrators). A subscription is required to rea ...
'' and ''
The Journal of Academic Librarianship ''The Journal of Academic Librarianship'' is a peer-reviewed academic journal that covers all topics dealing with academic libraries. The journal publishes book reviews, analytical articles, and bibliographic essays. It was established in 1975 and ...
'' have criticized Wikipedia's "Undue Weight" policy, concluding that the fact that Wikipedia explicitly is not designed to provide correct information about a subject, but rather focus on all the major viewpoints on the subject, give less attention to minor ones, and creates omissions that can lead to false beliefs based on incomplete information. Journalists
Oliver Kamm Oliver Kamm (born 1963) is a British journalist and writer who is a leader writer and columnist for ''The Times''. Early life and career Kamm is the son of translator Anthea Bell and publisher Antony Kamm. Kamm is the grandson of Adrian Bell ...
and
Edwin Black Edwin Black (born February 27, 1950) is an American historian and author, as well as a syndicated columnist, investigative journalist, and weekly talk show host on The Edwin Black Show. He specializes in human rights, the historical interplay be ...
alleged (in 2010 and 2011 respectively) that articles are dominated by the loudest and most persistent voices, usually by a group with an "ax to grind" on the topic. A 2008 article in ''
Education Next The Hoover Institution (officially The Hoover Institution on War, Revolution, and Peace; abbreviated as Hoover) is an American public policy think tank and research institution that promotes Economic liberty, personal and economic liberty, Free ...
'' Journal concluded that as a resource about controversial topics, Wikipedia is subject to manipulation and
spin Spin or spinning most often refers to: * Spinning (textiles), the creation of yarn or thread by twisting fibers together, traditionally by hand spinning * Spin, the rotation of an object around a central axis * Spin (propaganda), an intentionally b ...
. In 2020, Omer Benjakob and Stephen Harrison noted that "Media coverage of Wikipedia has radically shifted over the past two decades: once cast as an intellectual frivolity, it is now lauded as the 'last bastion of shared reality' online." In 2022,
libertarian Libertarianism (from french: libertaire, "libertarian"; from la, libertas, "freedom") is a political philosophy that upholds liberty as a core value. Libertarians seek to maximize autonomy and political freedom, and minimize the state's e ...
John Stossel John Frank Stossel (born March 6, 1947) is an American libertarian television presenter, author, consumer journalist, and pundit. He is known for his career as a host on ABC News, Fox Business Network, and Reason TV. Stossel's style combines r ...
opined that Wikipedia, a site he financially supported at one time, appears to have gradually taken a significant turn in bias to the political left, specifically on political topics. In 2006, the ''Wikipedia Watch'' criticism website listed dozens of examples of
plagiarism Plagiarism is the fraudulent representation of another person's language, thoughts, ideas, or expressions as one's own original work.From the 1995 '' Random House Compact Unabridged Dictionary'': use or close imitation of the language and thought ...
in the English Wikipedia.


Accuracy of content

Articles for traditional encyclopedias such as ''
Encyclopædia Britannica The (Latin for "British Encyclopædia") is a general knowledge English-language encyclopaedia. It is published by Encyclopædia Britannica, Inc.; the company has existed since the 18th century, although it has changed ownership various time ...
'' are written by experts, lending such encyclopedias a reputation for accuracy. However, a peer review in 2005 of forty-two scientific entries on both Wikipedia and ''Encyclopædia Britannica'' by the science journal ''Nature'' found few differences in accuracy, and concluded that "the average science entry in Wikipedia contained around four inaccuracies; ''Britannica'', about three." Joseph Reagle suggested that while the study reflects "a topical strength of Wikipedia contributors" in science articles, "Wikipedia may not have fared so well using a random sampling of articles or on humanities subjects."Reagle, pp. 165–166. Others raised similar critiques. The findings by ''Nature'' were disputed by ''Encyclopædia Britannica'', and in response, ''Nature'' gave a rebuttal of the points raised by ''Britannica''. In addition to the point-for-point disagreement between these two parties, others have examined the sample size and selection method used in the ''Nature'' effort, and suggested a "flawed study design" (in ''Nature''s manual selection of articles, in part or in whole, for comparison), absence of statistical analysis (e.g., of reported
confidence interval In frequentist statistics, a confidence interval (CI) is a range of estimates for an unknown parameter. A confidence interval is computed at a designated ''confidence level''; the 95% confidence level is most common, but other levels, such as 9 ...
s), and a lack of study "statistical power" (i.e., owing to small
sample size Sample size determination is the act of choosing the number of observations or Replication (statistics), replicates to include in a statistical sample. The sample size is an important feature of any empirical study in which the goal is to make stat ...
, 42 or 4× 101 articles compared, vs >105 and >106 set sizes for ''Britannica'' and the English Wikipedia, respectively). As a consequence of the open structure, Wikipedia "makes no guarantee of validity" of its content, since no one is ultimately responsible for any claims appearing in it. Concerns have been raised by ''PC World'' in 2009 regarding the lack of
accountability Accountability, in terms of ethics and governance, is equated with answerability, blameworthiness, liability, and the expectation of account-giving. As in an aspect of governance, it has been central to discussions related to problems in the publ ...
that results from users' anonymity, the insertion of false information,
vandalism Vandalism is the action involving deliberate destruction of or damage to public or private property. The term includes property damage, such as graffiti and defacement directed towards any property without permission of the owner. The term f ...
, and similar problems. Economist
Tyler Cowen Tyler Cowen (; born January 21, 1962) is an American economist, columnist and blogger. He is a professor at George Mason University, where he holds the Holbert L. Harris chair in the economics department. He hosts the economics blog ''Marginal R ...
wrote: "If I had to guess whether Wikipedia or the median refereed journal article on economics was more likely to be true after a not so long think I would opt for Wikipedia." He comments that some traditional sources of non-fiction suffer from systemic biases, and novel results, in his opinion, are over-reported in journal articles as well as relevant information being omitted from news reports. However, he also cautions that errors are frequently found on Internet sites and that academics and experts must be vigilant in correcting them.
Amy Bruckman Amy Susan Bruckman (born 1965) is a professor at the Georgia Institute of Technology affiliated with the Georgia Institute of Technology School of Interactive Computing, School of Interactive Computing and the GVU Center. She is best known for her ...
has argued that, due to the number of reviewers, "the content of a popular Wikipedia page is actually the most reliable form of information ever created". Critics argue that Wikipedia's open nature and a lack of proper sources for most of the information makes it unreliable. Some commentators suggest that Wikipedia may be reliable, but that the reliability of any given article is not clear. Editors of traditional
reference work A reference work is a work, such as a paper, book or periodical (or their electronic equivalents), to which one can refer for information. The information is intended to be found quickly when needed. Such works are usually ''referred'' to f ...
s such as the ''Encyclopædia Britannica'' have questioned the project's
utility As a topic of economics, utility is used to model worth or value. Its usage has evolved significantly over time. The term was introduced initially as a measure of pleasure or happiness as part of the theory of utilitarianism by moral philosopher ...
and status as an encyclopedia. Wikipedia co-founder
Jimmy Wales Jimmy Donal Wales (born August 7, 1966), also known on Wikipedia by the pseudonym Jimbo, is an American-British Internet entrepreneur, webmaster, and former financial trader. He is a co-founder of the online non-profit encyclopedia Wikipedi ...
has claimed that Wikipedia has largely avoided the problem of "fake news" because the Wikipedia community regularly debates the quality of sources in articles. Wikipedia's open structure inherently makes it an easy target for
Internet troll In slang, a troll is a person who posts or makes inflammatory, insincere, digressive, extraneous, or off-topic messages online (such as in social media, a newsgroup, a forum, a chat room, a online video game), or in real life, with the int ...
s,
spammer Spamming is the use of messaging systems to send multiple unsolicited messages (spam) to large numbers of recipients for the purpose of commercial advertising, for the purpose of non-commercial proselytizing, for any prohibited purpose (especial ...
s, and various forms of paid advocacy seen as counterproductive to the maintenance of a neutral and verifiable online encyclopedia. In response to paid advocacy editing and undisclosed editing issues, Wikipedia was reported in an article in ''The Wall Street Journal'' to have strengthened its rules and laws against undisclosed editing. The article stated that: "Beginning Monday
rom the date of the article, June 16, 2014 Rom, or ROM may refer to: Biomechanics and medicine * Risk of mortality, a medical classification to estimate the likelihood of death for a patient * Rupture of membranes, a term used during pregnancy to describe a rupture of the amniotic sac * ...
changes in Wikipedia's terms of use will require anyone paid to edit articles to disclose that arrangement.
Katherine Maher Katherine Roberts Maher (; born April 18, 1983) is a former chief executive officer and executive director of the Wikimedia Foundation. A member of the Council on Foreign Relations, Maher worked for UNICEF, the National Democratic Institu ...
, the nonprofit Wikimedia Foundation's chief communications officer, said the changes address a sentiment among volunteer editors that, 'we're not an advertising service; we're an encyclopedia. These issues, among others, had been parodied since the first decade of Wikipedia, notably by
Stephen Colbert Stephen Tyrone Colbert ( ; born May 13, 1964) is an American comedian, writer, producer, political commentator, actor, and television host. He is best known for hosting the satirical Comedy Central program ''The Colbert Report'' from 2005 to ...
on ''
The Colbert Report ''The Colbert Report'' ( ) is an American late-night talk and news satire television program hosted by Stephen Colbert that aired four days a week on Comedy Central from October 17, 2005, to December 18, 2014, for 1,447 episodes. The show focuse ...
''. ''Legal Research in a Nutshell'' (2011), cites Wikipedia as a "general source" that "can be a real boon" in "coming up to speed in the law governing a situation" and, "while not authoritative, can provide basic facts as well as leads to more in-depth resources".


Discouragement in education

Most university
lecturer Lecturer is an List of academic ranks, academic rank within many universities, though the meaning of the term varies somewhat from country to country. It generally denotes an academic expert who is hired to teach on a full- or part-time basis. T ...
s discourage students from citing any encyclopedia in
academic work An academy (Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of secondary or tertiary higher learning (and generally also research or honorary membership). The name traces back to Plato's school of philosophy, f ...
, preferring
primary source In the study of history as an academic discipline, a primary source (also called an original source) is an artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time under ...
s; some specifically prohibit Wikipedia citations. Wales stresses that encyclopedias of any type are not usually appropriate to use as citable sources, and should not be relied upon as authoritative. Wales once (2006 or earlier) said he receives about ten
email Electronic mail (email or e-mail) is a method of exchanging messages ("mail") between people using electronic devices. Email was thus conceived as the electronic ( digital) version of, or counterpart to, mail, at a time when "mail" meant ...
s weekly from students saying they got failing grades on papers because they cited Wikipedia; he told the students they got what they deserved. "For God's sake, you're in college; don't cite the encyclopedia", he said."Jimmy Wales", ''Biography Resource Center Online''. (Gale, 2006.) In February 2007, an article in ''
The Harvard Crimson ''The Harvard Crimson'' is the student newspaper of Harvard University and was founded in 1873. Run entirely by Harvard College undergraduates, it served for many years as the only daily newspaper in Cambridge, Massachusetts. Beginning in the f ...
'' newspaper reported that a few of the professors at
Harvard University Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of higher le ...
were including Wikipedia articles in their
syllabi A syllabus (; plural ''syllabuses'' or ''syllabi'') or specification is a document that communicates information about an academic course or class and defines expectations and responsibilities. It is generally an overview or summary of the curric ...
, although without realizing the articles might change. In June 2007, former president of the
American Library Association The American Library Association (ALA) is a nonprofit organization based in the United States that promotes libraries and library education internationally. It is the oldest and largest library association in the world, with 49,727 members a ...
Michael Gorman condemned Wikipedia, along with
Google Google LLC () is an American multinational technology company focusing on search engine technology, online advertising, cloud computing, computer software, quantum computing, e-commerce, artificial intelligence, and consumer electronics. ...
, stating that academics who endorse the use of Wikipedia are "the intellectual equivalent of a dietitian who recommends a steady diet of Big Macs with everything". In contrast, academic writing in Wikipedia has evolved in recent years and has been found to increase student interest, personal connection to the product, creativity in material processing, and international collaboration in the learning process.


Medical information

On March 5, 2014, Julie Beck writing for ''The Atlantic'' magazine in an article titled "Doctors' #1 Source for Healthcare Information: Wikipedia", stated that "Fifty percent of physicians look up conditions on the (Wikipedia) site, and some are editing articles themselves to improve the quality of available information."Julie Beck. "Doctors' #1 Source for Healthcare Information: Wikipedia". ''The Atlantic'', March 5, 2014. Beck continued to detail in this article new programs of
Amin Azzam Amin Azzam is a clinical professor in the department of psychiatry at the University of California, San Francisco (UCSF) School of Medicine. He is also a clinical professor at the University of California, Berkeley, the associate director of t ...
at the
University of San Francisco The University of San Francisco (USF) is a private Jesuit university in San Francisco, California. The university's main campus is located on a setting between the Golden Gate Bridge and Golden Gate Park. The main campus is nicknamed "The Hil ...
to offer medical school courses to medical students for learning to edit and improve Wikipedia articles on health-related issues, as well as internal quality control programs within Wikipedia organized by
James Heilman James M. Heilman (born ) is a Canadian emergency physician, Wikipedian, and advocate for the improvement of Wikipedia's health-related content. He encourages other clinicians to contribute to the online encyclopedia. With the Wikipedia usern ...
to improve a group of 200 health-related articles of central medical importance up to Wikipedia's highest standard of articles using its Featured Article and Good Article peer-review evaluation process. In a May 7, 2014, follow-up article in ''The Atlantic'' titled "Can Wikipedia Ever Be a Definitive Medical Text?", Julie Beck quotes WikiProject Medicine's James Heilman as stating: "Just because a reference is peer-reviewed doesn't mean it's a high-quality reference." Beck added that: "Wikipedia has its own peer review process before articles can be classified as 'good' or 'featured'. Heilman, who has participated in that process before, says 'less than one percent' of Wikipedia's medical articles have passed."


Coverage of topics and systemic bias

Wikipedia seeks to create a summary of all human knowledge in the form of an online encyclopedia, with each topic covered encyclopedically in one article. Since it has
terabyte The byte is a units of information, unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character (computing), character of text in a computer and for this ...
s of disk space, it can have far more topics than can be covered by any printed encyclopedia. The exact degree and manner of coverage on Wikipedia is under constant review by its editors, and disagreements are not uncommon (see deletionism and inclusionism). Wikipedia contains materials that some people may find objectionable, offensive, or pornographic. The "Wikipedia is not censored" policy has sometimes proved controversial: in 2008, Wikipedia rejected an online petition against the inclusion of images of Muhammad in the English edition of its
Muhammad Muhammad ( ar, مُحَمَّد;  570 – 8 June 632 Common Era, CE) was an Arab religious, social, and political leader and the founder of Islam. According to Muhammad in Islam, Islamic doctrine, he was a prophet Divine inspiration, di ...
article, citing this policy. The presence of politically, religiously, and pornographically sensitive materials in Wikipedia has led to the
censorship of Wikipedia Censorship of Wikipedia has occurred in many countries, including China, France, Germany, Iran, Myanmar, Pakistan, Russia, Saudi Arabia, Syria, Tunisia, Turkey, Uzbekistan, and Venezuela. Some instances are examples of widespread internet ce ...
by national authorities in China and Pakistan, amongst other countries. A 2008 study conducted by researchers at Carnegie Mellon University and Palo Alto Research Center gave a distribution of topics as well as growth (from July 2006 to January 2008) in each field: * Culture and Arts: 30% (210%) * Biographies and persons: 15% (97%) * Geography and places: 14% (52%) * Society and social sciences: 12% (83%) * History and events: 11% (143%) * Natural and Physical Sciences: 9% (213%) * Technology and Applied Science: 4% (−6%) * Religions and belief systems: 2% (38%) * Health: 2% (42%) * Mathematics and logic: 1% (146%) * Thought and Philosophy: 1% (160%) These numbers refer only to the number of articles: it is possible for one topic to contain a large number of short articles and another to contain a small number of large ones. Through its "Wikipedia Loves Libraries" program, Wikipedia has partnered with major public libraries such as the
New York Public Library for the Performing Arts The New York Public Library for the Performing Arts, Dorothy and Lewis B. Cullman Center, at 40 Lincoln Center Plaza, is located in Manhattan, New York City, at the Lincoln Center for the Performing Arts on the Upper West Side, between the Metro ...
to expand its coverage of underrepresented subjects and articles. A 2011 study conducted by researchers at the
University of Minnesota The University of Minnesota, formally the University of Minnesota, Twin Cities, (UMN Twin Cities, the U of M, or Minnesota) is a public university, public Land-grant university, land-grant research university in the Minneapolis–Saint Paul, Tw ...
indicated that male and female editors focus on different coverage topics. There was a greater concentration of females in the "people and arts" category, while males focus more on "geography and science".


Coverage of topics and selection bias

Research conducted by Mark Graham of the
Oxford Internet Institute The Oxford Internet Institute (OII) is a multi-disciplinary department of social and computer science dedicated to the study of information, communication, and technology, and is part of the Social Sciences Division of the University of Oxford ...
in 2009 indicated that the geographic distribution of article topics is highly uneven. Africa is the most underrepresented. Across 30 language editions of Wikipedia, historical articles and sections are generally Eurocentric and focused on recent events. An editorial in ''
The Guardian ''The Guardian'' is a British daily newspaper. It was founded in 1821 as ''The Manchester Guardian'', and changed its name in 1959. Along with its sister papers ''The Observer'' and ''The Guardian Weekly'', ''The Guardian'' is part of the Gu ...
'' in 2014 claimed that more effort went into providing references for a list of female porn actors than a
list of women writers * List of women writers (A–L) * List of women writers (M–Z) See also *Feminist literary criticism *Feminist science fiction *Feminist theory * Gender in science fiction *List of biographical dictionaries of female writers *List of early-mode ...
. Data has also shown that Africa-related material often faces omission; a knowledge gap that a July 2018 Wikimedia conference in
Cape Town Cape Town ( af, Kaapstad; , xh, iKapa) is one of South Africa's three capital cities, serving as the seat of the Parliament of South Africa. It is the legislative capital of the country, the oldest city in the country, and the second largest ...
sought to address.


Systemic biases

When multiple editors contribute to one topic or set of topics,
systemic bias Systemic bias, also called institutional bias, and related to structural bias, is the inherent tendency of a process to support particular outcomes. The term generally refers to human systems such as institutions. Institutional bias and structur ...
may arise, due to the demographic backgrounds of the editors. In 2011, Wales claimed that the unevenness of coverage is a reflection of the demography of the editors, citing for example "biographies of famous women through history and issues surrounding early childcare". The October 22, 2013, essay by Tom Simonite in MIT's ''Technology Review'' titled "The Decline of Wikipedia" discussed the effect of systemic bias and policy creep on the downward trend in the number of editors. Systemic bias on Wikipedia may follow that of culture generally, for example favoring certain nationalities, ethnicities or majority religions. It may more specifically follow the biases of
Internet culture Internet culture is a culture based on the many way people have used computer networks and their use for communication, entertainment, business, and recreation. Some features of Internet culture include online communities, gaming, and social media ...
, inclining to be young, male, English-speaking, educated, technologically aware, and wealthy enough to spare time for editing. Biases, intrinsically, may include an overemphasis on topics such as pop culture, technology, and current events.
Taha Yasseri , birth_date = , birth_place = , nationality = British , region = , workplaces = University of OxfordOxford Internet Institute Alan Turing Institute , alma_mater = Sharif University of Technology (MSc)Taha Yasseri's University of Götting ...
of the
University of Oxford , mottoeng = The Lord is my light , established = , endowment = £6.1 billion (including colleges) (2019) , budget = £2.145 billion (2019–20) , chancellor ...
, in 2013, studied the statistical trends of systemic bias at Wikipedia introduced by editing conflicts and their resolution. His research examined the
counterproductive work behavior Counterproductive work behavior (CWB) is employee behavior that goes against the legitimate interests of an organization. These behaviors can harm organizations or people in organizations including employees a ...
of edit warring. Yasseri contended that simple reverts or "undo" operations were not the most significant measure of counterproductive behavior at Wikipedia and relied instead on the statistical measurement of detecting "reverting/reverted pairs" or "mutually reverting edit pairs". Such a "mutually reverting edit pair" is defined where one editor reverts the edit of another editor who then, in sequence, returns to revert the first editor in the "mutually reverting edit pairs". The results were tabulated for several language versions of Wikipedia. The English Wikipedia's three largest conflict rates belonged to the articles
George W. Bush George Walker Bush (born July 6, 1946) is an American politician who served as the 43rd president of the United States from 2001 to 2009. A member of the Republican Party, Bush family, and son of the 41st president George H. W. Bush, he ...
,
anarchism Anarchism is a political philosophy and movement that is skeptical of all justifications for authority and seeks to abolish the institutions it claims maintain unnecessary coercion and hierarchy, typically including, though not necessa ...
, and
Muhammad Muhammad ( ar, مُحَمَّد;  570 – 8 June 632 Common Era, CE) was an Arab religious, social, and political leader and the founder of Islam. According to Muhammad in Islam, Islamic doctrine, he was a prophet Divine inspiration, di ...
. By comparison, for the German Wikipedia, the three largest conflict rates at the time of the
Oxford Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
study were for the articles covering
Croatia , image_flag = Flag of Croatia.svg , image_coat = Coat of arms of Croatia.svg , anthem = "Lijepa naša domovino"("Our Beautiful Homeland") , image_map = , map_caption = , capit ...
,
Scientology Scientology is a set of beliefs and practices invented by American author L. Ron Hubbard, and an associated movement. It has been variously defined as a cult, a business, or a new religious movement. The most recent published census data indi ...
, and
9/11 conspiracy theories 9/11 conspiracy theories attribute the preparation and execution of the September 11 attacks against the United States to parties other than, or in addition to, al-Qaeda. These include the theory that high-level government officials had adv ...
. Researchers from
Washington University Washington University in St. Louis (WashU or WUSTL) is a private research university with its main campus in St. Louis County, and Clayton, Missouri. Founded in 1853, the university is named after George Washington. Washington University is r ...
developed a statistical model to measure systematic bias in the behavior of Wikipedia's users regarding controversial topics. The authors focused on behavioral changes of the encyclopedia's administrators after assuming the post, writing that systematic bias occurred after the fact.


Explicit content

Wikipedia has been criticized for allowing information about graphic content. Articles depicting what some critics have called objectionable content (such as
feces Feces ( or faeces), known colloquially and in slang as poo and poop, are the solid or semi-solid remains of food that was not digested in the small intestine, and has been broken down by bacteria in the large intestine. Feces contain a relati ...
,
cadaver A cadaver or corpse is a dead human body that is used by medical students, physicians and other scientists to study anatomy, identify disease sites, determine causes of death, and provide tissue to repair a defect in a living human being. Stud ...
,
human penis The human penis is an external male intromittent organ that additionally serves as the urinary duct. The main parts are the root (radix); the body (corpus); and the epithelium of the penis including the shaft skin and the foreskin (prepuce) co ...
,
vulva The vulva (plural: vulvas or vulvae; derived from Latin for wrapper or covering) consists of the external sex organ, female sex organs. The vulva includes the mons pubis (or mons veneris), labia majora, labia minora, clitoris, bulb of vestibu ...
, and
nudity Nudity is the state of being in which a human is without clothing. The loss of body hair was one of the physical characteristics that marked the biological evolution of modern humans from their hominin ancestors. Adaptations related to ...
) contain graphic pictures and detailed information easily available to anyone with access to the internet, including children. The site also includes
sexual content In media discourse, sexual content is material depicting sexual behavior. The sexual behavior involved may be explicit, implicit sexual behavior such as flirting, or include sexual language and euphemisms. Sexual content is a large factor in most ...
such as images and videos of
masturbation Masturbation is the sexual stimulation of one's own genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. The stimulation may involve hands, fingers, everyday objects, sex toys such as vibrators, or combinatio ...
and
ejaculation Ejaculation is the discharge of semen (the ''ejaculate''; normally containing sperm) from the male reproductory tract as a result of an orgasm. It is the final stage and natural objective of male sexual stimulation, and an essential componen ...
, illustrations of
zoophilia Zoophilia is a paraphilia involving a sexual fixation on non-human animals. Bestiality is cross-species sexual activity between humans and non-human animals. The terms are often used interchangeably, but some researchers make a distinction b ...
, and photos from hardcore pornographic films in its articles. It also has non-sexual photographs of nude children. The Wikipedia article about '' Virgin Killer''—a 1976 album from the German
rock Rock most often refers to: * Rock (geology), a naturally occurring solid aggregate of minerals or mineraloids * Rock music, a genre of popular music Rock or Rocks may also refer to: Places United Kingdom * Rock, Caerphilly, a location in Wales ...
band Band or BAND may refer to: Places *Bánd, a village in Hungary *Band, Iran, a village in Urmia County, West Azerbaijan Province, Iran * Band, Mureș, a commune in Romania *Band-e Majid Khan, a village in Bukan County, West Azerbaijan Province, I ...
Scorpions Scorpions are predatory arachnids of the order Scorpiones. They have eight legs, and are easily recognized by a pair of grasping pincers and a narrow, segmented tail, often carried in a characteristic forward curve over the back and always end ...
—features a picture of the album's original cover, which depicts a naked
prepubescent Preadolescence is a stage of human development following middle childhood and preceding adolescence.New Oxford American Dictionary. 2nd Edition. 2005. Oxford University Press. It commonly ends with the beginning of puberty. Preadolescence is c ...
girl. The original release cover caused controversy and was replaced in some countries. In December 2008, access to the Wikipedia article ''Virgin Killer'' was blocked for four days by most
Internet service provider An Internet service provider (ISP) is an organization that provides services for accessing, using, or participating in the Internet. ISPs can be organized in various forms, such as commercial, community-owned, non-profit, or otherwise private ...
s in the United Kingdom after the
Internet Watch Foundation The Internet Watch Foundation (IWF) is a registered charity based in Cambridge, England. It states that its remit is "to minimise the availability of online sexual abuse content, specifically child sexual abuse images and videos hosted anywhe ...
(IWF) decided the album cover was a potentially illegal indecent image and added the article's URL to a "blacklist" it supplies to British internet service providers. In April 2010, Sanger wrote a letter to the Federal Bureau of Investigation, outlining his concerns that two categories of images on
Wikimedia Commons Wikimedia Commons (or simply Commons) is a media repository of free-to-use images, sounds, videos and other media. It is a project of the Wikimedia Foundation. Files from Wikimedia Commons can be used across all of the Wikimedia projects in ...
contained child pornography, and were in violation of US federal obscenity law. Sanger later clarified that the images, which were related to
pedophilia Pedophilia ( alternatively spelt paedophilia) is a psychiatric disorder in which an adult or older adolescent experiences a primary or exclusive sexual attraction to prepubescent children. Although girls typically begin the process of puberty a ...
and one about
lolicon In Japanese popular culture, is a genre of fictional media in which young (or young-looking) girl characters appear in romantic or sexual contexts. The term, a portmanteau of the English phrase "Lolita complex", also refers to desire and a ...
, were not of real children, but said that they constituted "obscene visual representations of the sexual abuse of children", under the
PROTECT Act of 2003 The PROTECT Act of 2003 (, 117 Stat. 650, S. 151, enacted April 30, 2003) is a United States law with the stated intent of preventing child abuse as well as investigating and prosecuting violent crimes against children. "PROTECT" is a contrived ...
. That law bans photographic child pornography and cartoon images and drawings of children that are obscene under American law. Sanger also expressed concerns about access to the images on Wikipedia in schools.
Wikimedia Foundation The Wikimedia Foundation, Inc., or Wikimedia for short and abbreviated as WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California and registered as a charitable foundation under local laws. Best kno ...
spokesman Jay Walsh strongly rejected Sanger's accusation, saying that Wikipedia did not have "material we would deem to be illegal. If we did, we would remove it." Following the complaint by Sanger, Wales deleted sexual images without consulting the community. After some editors who volunteered to maintain the site argued that the decision to delete had been made hastily, Wales voluntarily gave up some of the powers he had held up to that time as part of his co-founder status. He wrote in a message to the Wikimedia Foundation mailing-list that this action was "in the interest of encouraging this discussion to be about real philosophical/content issues, rather than be about me and how quickly I acted". Critics, including
Wikipediocracy Wikipediocracy is a website for discussion and criticism of Wikipedia. Its members have brought information about List of Wikipedia controversies, Wikipedia's controversies to the attention of the media. The site was founded in March 2012 by users ...
, noticed that many of the pornographic images deleted from Wikipedia since 2010 have reappeared.


Privacy

One
privacy Privacy (, ) is the ability of an individual or group to seclude themselves or information about themselves, and thereby express themselves selectively. The domain of privacy partially overlaps with security, which can include the concepts of a ...
concern in the case of Wikipedia is the right of a private citizen to remain a "private citizen" rather than a "
public figure A public figure is a person who has achieved notoriety, prominence or fame within a society, whether through achievement, luck, action, or in some cases through no purposeful action of their own, In the context of defamation actions (libel and s ...
" in the eyes of the law.Se
"Libel"
by David McHam for the legal distinction.
It is a battle between the right to be anonymous in
cyberspace Cyberspace is a concept describing a widespread interconnected digital technology. "The expression dates back from the first decade of the diffusion of the internet. It refers to the online world as a world 'apart', as distinct from everyday rea ...
and the right to be anonymous in
real life Real life is a phrase used originally in literature to distinguish between the real world and fictional, virtual or idealized worlds, and in acting to distinguish between actors and the characters they portray. It has become a popular term on the ...
("
meatspace Real life is a phrase used originally in literature to distinguish between the real world and fictional, virtual or idealized worlds, and in acting to distinguish between actors and the characters they portray. It has become a popular term on the ...
"). A particular problem occurs in the case of a relatively unimportant individual and for whom there exists a Wikipedia page against her or his wishes. In January 2006, a German court ordered the
German Wikipedia The German Wikipedia (german: Deutschsprachige Wikipedia) is the German-language edition of Wikipedia, a free and publicly editable online encyclopedia. Founded on March 16, 2001, it is the second-oldest Wikipedia (after the English Wikipedia), ...
shut down within Germany because it stated the full name of
Boris Floricic Boris Floricic, better known by his pseudonym Tron (8 June 1972 – 17 October 1998), was a German hacker and phreaker whose death in unclear circumstances has led to various conspiracy theories. He is also known for his Diplom thesis pre ...
, aka "Tron", a deceased hacker. On February 9, 2006, the injunction against Wikimedia Deutschland was overturned, with the court rejecting the notion that Tron's
right to privacy The right to privacy is an element of various legal traditions that intends to restrain governmental and private actions that threaten the privacy of individuals. Over 150 national constitutions mention the right to privacy. On 10 December 1948 ...
or that of his parents was being violated. Wikipedia has a "" that uses Znuny, a
free and open-source software Free and open-source software (FOSS) is a term used to refer to groups of software consisting of both free software and open-source software where anyone is freely licensed to use, copy, study, and change the software in any way, and the source ...
fork of
OTRS OTRS (originally Open-Source Ticket Request System) is a service management suite. The suite contains an agent portal, admin dashboard and customer portal. In the agent portal, teams process tickets and requests from customers (internal or exter ...
to handle queries without having to reveal the identities of the involved parties. This is used, for example, in confirming the permission for using individual images and other media in the project.


Sexism

Wikipedia was described in 2015 as harboring a battleground culture of
sexism Sexism is prejudice or discrimination based on one's sex or gender. Sexism can affect anyone, but it primarily affects women and girls.There is a clear and broad consensus among academic scholars in multiple fields that sexism refers primari ...
and
harassment Harassment covers a wide range of behaviors of offensive nature. It is commonly understood as behavior that demeans, humiliates or embarrasses a person, and it is characteristically identified by its unlikelihood in terms of social and moral ...
. The perceived toxic attitudes and tolerance of violent and abusive language were reasons put forth in 2013 for the gender gap in Wikipedia editorship.
Edit-a-thon An edit-a-thon (sometimes written editathon) is an event where some editors of online communities such as Wikipedia, OpenStreetMap (also as a "mapathon"), and LocalWiki edit and improve a specific topic or type of content. The events typically ...
s have been held to encourage female editors and increase the coverage of women's topics. A comprehensive 2008 survey, published in 2016, by Julia B. Bear of
Stony Brook University Stony Brook University (SBU), officially the State University of New York at Stony Brook, is a public research university in Stony Brook, New York. Along with the University at Buffalo, it is one of the State University of New York system's ...
's College of Business and Benjamin Collier of
Carnegie Mellon University Carnegie Mellon University (CMU) is a private research university in Pittsburgh, Pennsylvania. One of its predecessors was established in 1900 by Andrew Carnegie as the Carnegie Technical Schools; it became the Carnegie Institute of Technology ...
found significant gender differences in: confidence in expertise, discomfort with editing, and response to critical feedback. "Women reported less confidence in their expertise, expressed greater discomfort with editing (which typically involves conflict), and reported more negative responses to critical feedback compared to men."


Operation


Wikimedia Foundation and affiliate movements

Wikipedia is hosted and funded by the
Wikimedia Foundation The Wikimedia Foundation, Inc., or Wikimedia for short and abbreviated as WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California and registered as a charitable foundation under local laws. Best kno ...
, a non-profit organization which also operates Wikipedia-related projects such as
Wiktionary Wiktionary ( , , rhyming with "dictionary") is a multilingual, web-based project to create a free content dictionary of terms (including words, phrases, proverbs, linguistic reconstructions, etc.) in all natural languages and in a number ...
and
Wikibooks Wikibooks (previously called ''Wikimedia Free Textbook Project'' and ''Wikimedia-Textbooks'') is a wiki-based Wikimedia project hosted by the Wikimedia Foundation for the creation of free content digital textbooks and annotated texts that any ...
. The foundation relies on public contributions and grants to fund its mission. The foundation's 2013 IRS Form 990 shows revenue of $39.7 million and expenses of almost $29 million, with assets of $37.2 million and liabilities of about $2.3 million. In May 2014, Wikimedia Foundation named
Lila Tretikov Lila Tretikov () (born Olga (Lyalya) Tretyakova, russian: Ольга (Ляля) Третьяко́ва, January 25, 1978) is a Russian–American engineer and manager. Early life and education Tretikov was born in Moscow, Soviet Union. Her fath ...
as its second executive director, taking over for Sue Gardner. The ''Wall Street Journal'' reported on May 1, 2014, that Tretikov's information technology background from her years at University of California offers Wikipedia an opportunity to develop in more concentrated directions guided by her often repeated position statement that, "Information, like air, wants to be free."Jeff Elder, ''The Wall Street Journal'', May 1, 2014, "Wikipedia's New Chief: From Soviet Union to World's Sixth-Largest Site". The same ''Wall Street Journal'' article reported these directions of development according to an interview with spokesman Jay Walsh of Wikimedia, who "said Tretikov would address that issue ( paid advocacy) as a priority. 'We are really pushing toward more transparency... We are reinforcing that paid advocacy is not welcome.' Initiatives to involve greater diversity of contributors, better mobile support of Wikipedia, new geo-location tools to find local content more easily, and more tools for users in the second and third world are also priorities", Walsh said. Following the departure of Tretikov from Wikipedia due to issues concerning the use of the "superprotection" feature which some language versions of Wikipedia have adopted, Katherine Maher became the third executive director of the Wikimedia Foundation in June 2016. Maher stated that one of her priorities would be the issue of editor harassment endemic to Wikipedia as identified by the Wikipedia board in December. Maher stated regarding the harassment issue that: "It establishes a sense within the community that this is a priority... nd that correction requires thatit has to be more than words." Maher served as executive director until April 2021.
Maryana Iskander Maryana Iskander (; ar, ماريانا إسكندر; born September 1, 1975) is an Egyptian-born American social entrepreneur and lawyer. In 2022, she became the chief executive officer (CEO) of the Wikimedia Foundation, succeeding Katherine Ma ...
was named the incoming CEO in September 2021, and took over that role in January 2022. Wikipedia is also supported by many organizations and groups that are affiliated with the Wikimedia Foundation but independently-run, called
Wikimedia movement affiliates The Wikimedia Foundation, Inc., or Wikimedia for short and abbreviated as WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California and registered as foundation (United States law), a charitable foundati ...
. These include
Wikimedia chapters Wikimedia chapters are national or sub-national not-for-profit organizations created to promote the interests of Wikimedia projects locally. Chapters are legally independent of the Wikimedia Foundation, entering into an agreement with the founda ...
(which are national or sub-national organizations, such as Wikimedia Deutschland and Wikimédia France), thematic organizations (such as Amical Wikimedia for the
Catalan language Catalan (; autonym: , ), known in the Valencian Community and Carche as ''Valencian'' (autonym: ), is a Western Romance language. It is the official language of Andorra, and an official language of three autonomous communities in eastern Spa ...
community), and user groups. These affiliates participate in the promotion, development, and funding of Wikipedia.


Software operations and support

The operation of Wikipedia depends on
MediaWiki MediaWiki is a free and open-source wiki software. It is used on Wikipedia and almost all other Wikimedia websites, including Wiktionary, Wikimedia Commons and Wikidata; these sites define a large part of the requirement set for MediaWiki ...
, a custom-made,
free Free may refer to: Concept * Freedom, having the ability to do something, without having to obey anyone/anything * Freethought, a position that beliefs should be formed only on the basis of logic, reason, and empiricism * Emancipate, to procur ...
and
open source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...
wiki software Wiki software (also known as a wiki engine or a wiki application), is collaborative software that runs a wiki, which allows the users to create and collaboratively edit pages or entries via a web browser. A wiki system is usually a web application ...
platform written in
PHP PHP is a general-purpose scripting language geared toward web development. It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1993 and released in 1995. The PHP reference implementation is now produced by The PHP Group ...
and built upon the
MySQL MySQL () is an open-source relational database management system (RDBMS). Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, and "SQL", the acronym for Structured Query Language. A relational database o ...
database system. The software incorporates programming features such as a
macro language In computer programming, a macro (short for "macro instruction"; ) is a rule or pattern that specifies how a certain input should be mapped to a replacement output. Applying a macro to an input is known as macro expansion. The input and output ...
,
variable Variable may refer to: * Variable (computer science), a symbolic name associated with a value and whose associated value may be changed * Variable (mathematics), a symbol that represents a quantity in a mathematical expression, as used in many ...
s, a
transclusion In computer science, transclusion is the inclusion of part or all of an electronic document into one or more other documents by reference via hypertext. Transclusion is usually performed when the referencing document is displayed, and is normal ...
system for
template Template may refer to: Tools * Die (manufacturing), used to cut or shape material * Mold, in a molding process * Stencil, a pattern or overlay used in graphic arts (drawing, painting, etc.) and sewing to replicate letters, shapes or designs Co ...
s, and
URL redirection URL redirection, also called URL forwarding, is a World Wide Web technique for making a web page available under more than one URL address. When a web browser attempts to open a URL that has been redirected, a page with a different URL is opened ...
. MediaWiki is licensed under the
GNU General Public License The GNU General Public License (GNU GPL or simply GPL) is a series of widely used free software licenses that guarantee end users the Four Freedoms (Free software), four freedoms to run, study, share, and modify the software. The license was th ...
(GPL) and it is used by all Wikimedia projects, as well as many other wiki projects. Originally, Wikipedia ran on
UseModWiki UseModWiki is a wiki software written in Perl and licensed under the GNU General Public License. Pages in UseModWiki are stored in ordinary files, not in a relational database. Wikipedias in English and many other languages were powered by Use ...
written in
Perl Perl is a family of two high-level, general-purpose, interpreted, dynamic programming languages. "Perl" refers to Perl 5, but from 2000 to 2019 it also referred to its redesigned "sister language", Perl 6, before the latter's name was offici ...
by Clifford Adams (Phase I), which initially required
CamelCase Camel case (sometimes stylized as camelCase or CamelCase, also known as camel caps or more formally as medial capitals) is the practice of writing phrases without spaces or punctuation. The format indicates the separation of words with a single ...
for article hyperlinks; the present double bracket style was incorporated later. Starting in January 2002 (Phase II), Wikipedia began running on a PHP wiki engine with a MySQL database; this software was custom-made for Wikipedia by
Magnus Manske Heinrich Magnus Manske (born 24 May 1974) is a senior staff scientist at the Wellcome Trust Sanger Institute in Cambridge, UK and a software developer of one of the first versions of the MediaWiki software, which powers Wikipedia and a number o ...
. The Phase II software was repeatedly modified to accommodate the exponentially increasing demand. In July 2002 (Phase III), Wikipedia shifted to the third-generation software, MediaWiki, originally written by
Lee Daniel Crocker Lee Daniel Crocker (born July 3, 1963) is an American computer programmer. He is best known for rewriting the software upon which Wikipedia runs, to address scalability problems. This software, originally known as "Phase III", went live in July 2 ...
. Several MediaWiki extensions are installed to extend the functionality of the MediaWiki software. In April 2005, a
Lucene Apache Lucene is a free and open-source search engine software library, originally written in Java by Doug Cutting. It is supported by the Apache Software Foundation and is released under the Apache Software License. Lucene is widely used as a ...
extension was added to MediaWiki's built-in search and Wikipedia switched from
MySQL MySQL () is an open-source relational database management system (RDBMS). Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, and "SQL", the acronym for Structured Query Language. A relational database o ...
to Lucene for searching. Lucene was later replaced by CirrusSearch which is based on
Elasticsearch Elasticsearch is a search engine based on the Lucene library. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. Elasticsearch is developed in Java and is dual-l ...
. In July 2013, after extensive beta testing, a WYSIWYG (What You See Is What You Get) extension,
VisualEditor VisualEditor (VE) is an online rich-text editor for MediaWiki-powered wikis that provides a direct visual way to edit pages based on the "what you see is what you get" principle. It was developed by the Wikimedia Foundation in partnership with ...
, was opened to public use. It was met with much rejection and criticism, and was described as "slow and buggy". The feature was changed from opt-out to opt-in afterward.


Automated editing

Computer programs called
bot Bot may refer to: Sciences Computing and technology * Chatbot, a computer program that converses in natural language * Internet bot, a software application that runs automated tasks (scripts) over the Internet **a Spambot, an internet bot des ...
s have often been used to perform simple and repetitive tasks, such as correcting common misspellings and stylistic issues, or to start articles such as geography entries in a standard format from statistical data. One controversial contributor, , creating articles with his
bot Bot may refer to: Sciences Computing and technology * Chatbot, a computer program that converses in natural language * Internet bot, a software application that runs automated tasks (scripts) over the Internet **a Spambot, an internet bot des ...
was reported to create up to 10,000 articles on the Swedish Wikipedia on certain days. Additionally, there are bots designed to automatically notify editors when they make common editing errors (such as unmatched quotes or unmatched parentheses). Edits falsely identified by bots as the work of a banned editor can be restored by other editors. An anti-vandal bot is programmed to detect and revert vandalism quickly. Bots are able to indicate edits from particular accounts or IP address ranges, as occurred at the time of the shooting down of the MH17 jet incident in July 2014 when it was reported that edits were made via IPs controlled by the Russian government. Bots on Wikipedia must be approved before activation. According to
Andrew Lih Andrew Lih (; born 1968)Andrew Lih
"
"Monthly request statistics"
Wikimedia. Retrieved October 31, 2008. page requests are first passed to a front-end layer of
Varnish Varnish is a clear transparent hard protective coating or film. It is not a stain. It usually has a yellowish shade from the manufacturing process and materials used, but it may also be pigmented as desired, and is sold commercially in various ...
caching servers and back-end layer caching is done by
Apache Traffic Server The Apache Traffic Server (ATS) is a modular, high-performance reverse proxy and forward proxy server, generally comparable to Nginx and Squid. It was created by Inktomi, and distributed as a commercial product called the Inktomi Traffic Serv ...
. Further statistics, based on a publicly available 3-month Wikipedia access trace, are available. Requests that cannot be served from the Varnish cache are sent to load-balancing servers running the
Linux Virtual Server Linux Virtual Server (LVS) is Load balancing (computing), load balancing software for Linux kernel–based operating systems. LVS is a free and open-source project started by Wensong Zhang in May 1998, subject to the requirements of the GNU ...
software, which in turn pass them to one of the Apache web servers for page rendering from the database. The web servers deliver pages as requested, performing page rendering for all the language editions of Wikipedia. To increase speed further, rendered pages are cached in a distributed memory cache until invalidated, allowing page rendering to be skipped entirely for most common page accesses. Wikipedia currently runs on dedicated clusters of
Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which ...
servers running the
Debian Debian (), also known as Debian GNU/Linux, is a Linux distribution composed of free and open-source software, developed by the community-supported Debian Project, which was established by Ian Murdock on August 16, 1993. The first version of D ...
operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also in ...
. there were 300 in Florida and 44 in
Amsterdam Amsterdam ( , , , lit. ''The Dam on the River Amstel'') is the Capital of the Netherlands, capital and Municipalities of the Netherlands, most populous city of the Netherlands, with The Hague being the seat of government. It has a population ...
. By January 22, 2013, Wikipedia had migrated its primary data center to an
Equinix Equinix, Inc. is an American multinational company headquartered in Redwood City, California, that specializes in Internet connection and data centers. The company is a leader in global colocation data center market share, with 240 data centers ...
facility in
Ashburn, Virginia Ashburn is a census-designated place (CDP) in Loudoun County, Virginia, United States. At the 2010 United States Census, its population was 43,511, up from 3,393 twenty years earlier. It is northwest of Washington, D.C., and part of the Washingt ...
. In 2017, Wikipedia installed a caching cluster in an Equinix facility in
Singapore Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, borde ...
, the first of its kind in Asia.


Internal research and operational development

Following growing amounts of incoming donations exceeding seven digits in 2013 as recently reported, the Foundation has reached a threshold of assets which qualify its consideration under the principles of
industrial organization In economics, industrial organization is a field that builds on the theory of the firm by examining the structure of (and, therefore, the boundaries between) firms and market (economics), markets. Industrial organization adds real-world complic ...
economics to indicate the need for the re-investment of donations into the internal research and development of the Foundation. Two of the recent projects of such internal research and development have been the creation of a Visual Editor and a largely under-utilized "Thank" tab which were developed to ameliorate issues of editor attrition, which have met with limited success. The estimates for reinvestment by industrial organizations into internal research and development was studied by Adam Jaffe, who recorded that the range of 4% to 25% annually was to be recommended, with high-end technology requiring the higher level of support for internal reinvestment.''Patents, Citations, and Innovations'', by Adam B. Jaffe, Manuel Trajtenberg, pp. 89–153. At the 2013 level of contributions for Wikimedia presently documented as 45 million dollars, the computed budget level recommended by Jaffe and Caballero for reinvestment into internal research and development is between 1.8 million and 11.3 million dollars annually. In 2016, the level of contributions were reported by'' Bloomberg News'' as being at $77 million annually, updating the Jaffe estimates for the higher level of support to between $3.08 million and $19.2 million annually.


Internal news publications

Community-produced news publications include the
English Wikipedia The English Wikipedia is, along with the Simple English Wikipedia, one of two English-language editions of Wikipedia, an online encyclopedia. It was founded on January 15, 2001, as Wikipedia's first edition, and, as of , has the most arti ...
's ''
The Signpost ''The Signpost'' (formerly ''The Wikipedia Signpost'') is the Wikimedia movement's online newspaper. Managed by the volunteer community, it is published online with contributions from Wikimedia editors. The newspaper reports on the Wikimedia c ...
'', founded in 2005 by Michael Snow, an attorney, Wikipedia administrator, and former chair of the
Wikimedia Foundation The Wikimedia Foundation, Inc., or Wikimedia for short and abbreviated as WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California and registered as a charitable foundation under local laws. Best kno ...
board of trustees. It covers news and events from the site, as well as major events from other
Wikimedia project The Wikimedia Foundation, Inc., or Wikimedia for short and abbreviated as WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California and registered as a charitable foundation under local laws. Best kno ...
s, such as
Wikimedia Commons Wikimedia Commons (or simply Commons) is a media repository of free-to-use images, sounds, videos and other media. It is a project of the Wikimedia Foundation. Files from Wikimedia Commons can be used across all of the Wikimedia projects in ...
. Similar publications are the German-language ''Kurier'', and the Portuguese-language ''Correio da Wikipédia''. Other past and present community news publications on English Wikipedia include the ''Wikiworld'' webcomic, the Wikipedia Weekly podcast, and newsletters of specific WikiProject, WikiProjects like ''The Bugle'' from WikiProject Military History and the monthly newsletter from The Guild of Copy Editors. There are also several publications from the
Wikimedia Foundation The Wikimedia Foundation, Inc., or Wikimedia for short and abbreviated as WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California and registered as a charitable foundation under local laws. Best kno ...
and multilingual publications such as Wikimedia Diff and ''This Month in Education''.


The Wikipedia Library

The Wikipedia Library is a resource for Wikipedia editors which provides free access to a wide range of Electronic publishing, digital publications, so that they can consult and cite these while editing the encyclopedia. Over 60 publishers have partnered with The Wikipedia Library to provide access to their resources: when ICE Publishing joined in 2020, a spokesman said "By enabling free access to our content for Wikipedia editors, we hope to further the research community's resources – creating and updating Wikipedia entries on civil engineering which are read by thousands of monthly readers."


Access to content


Content licensing

When the project was started in 2001, all text in Wikipedia was covered by the
GNU Free Documentation License The GNU Free Documentation License (GNU FDL or simply GFDL) is a copyleft license for free documentation, designed by the Free Software Foundation (FSF) for the GNU Project. It is similar to the GNU General Public License, giving readers the r ...
(GFDL), a copyleft license permitting the redistribution, creation of derivative works, and commercial use of content while authors retain copyright of their work. The GFDL was created for software manuals that come with free software programs licensed under the GPL. This made it a poor choice for a general reference work: for example, the GFDL requires the reprints of materials from Wikipedia to come with a full copy of the GFDL text. In December 2002, the Creative Commons license was released: it was specifically designed for creative works in general, not just for software manuals. The license gained popularity among bloggers and others distributing creative works on the Web. The Wikipedia project sought the switch to the Creative Commons. Because the two licenses, GFDL and Creative Commons, were incompatible, in November 2008, following the request of the project, the Free Software Foundation (FSF) released a new version of the GFDL designed specifically to allow Wikipedia to by August 1, 2009. (A new version of the GFDL automatically covers Wikipedia contents.) In April 2009, Wikipedia and its sister projects held a community-wide referendum which decided the switch in June 2009. The handling of media files (e.g. image files) varies across language editions. Some language editions, such as the English Wikipedia, include non-free image files under
fair use Fair use is a doctrine in United States law that permits limited use of copyrighted material without having to first acquire permission from the copyright holder. Fair use is one of the limitations to copyright intended to balance the interests ...
doctrine, while the others have opted not to, in part because of the lack of fair use doctrines in their home countries (e.g. in copyright law of Japan, Japanese copyright law). Media files covered by free content licenses (e.g. Creative Commons' CC BY-SA) are shared across language editions via
Wikimedia Commons Wikimedia Commons (or simply Commons) is a media repository of free-to-use images, sounds, videos and other media. It is a project of the Wikimedia Foundation. Files from Wikimedia Commons can be used across all of the Wikimedia projects in ...
repository, a project operated by the Wikimedia Foundation. Wikipedia's accommodation of varying international copyright laws regarding images has led some to observe that its photographic coverage of topics lags behind the quality of the encyclopedic text. The Wikimedia Foundation is not a licensor of content on Wikipedia and/or its related projects, but merely a hosting service for contributors to and licensors of Wikipedia, a position which was successfully defended in 2004 in a court in France.


Methods of access

Because Wikipedia content is distributed under an open license, anyone can reuse or re-distribute it at no charge. The content of Wikipedia has been published in many forms, both online and offline, outside the Wikipedia website. * Websites: Thousands of "mirror sites" exist that republish content from Wikipedia: two prominent ones, that also include content from other reference sources, are Reference.com and Answers.com. Another example is Wapedia, which began to display Wikipedia content in a mobile-device-friendly format before Wikipedia itself did. * Mobile apps: A variety of mobile apps provide access to Wikipedia on mobile device, hand-held devices, including both Android (operating system), Android and iOS devices (see Wikipedia App, Wikipedia apps). (see also #Mobile access, Mobile access.) * Search engines: Some web
search engine A search engine is a software system designed to carry out web searches. They search the World Wide Web in a systematic way for particular information specified in a textual web search query. The search results are generally presented in a ...
s make special use of Wikipedia content when displaying search results: examples include Microsoft Bing (via technology gained from Powerset (company), Powerset) and DuckDuckGo. * Compact discs, DVDs: Collections of Wikipedia articles have been published on optical discs. An English version, 2006 Wikipedia CD Selection, contained about 2,000 articles."Wikipedia on DVD"
Linterweb. Retrieved June 1, 2007. "Linterweb is authorized to make a commercial use of the Wikipedia trademark restricted to the selling of the Encyclopedia CDs and DVDs".
"Wikipedia 0.5 Available on a CD-ROM"
''Wikipedia on DVD''. Linterweb. "The DVD or CD-ROM version 0.5 was commercially available for purchase." Retrieved June 1, 2007.
The Polish-language version contains nearly 240,000 articles. There are German- and Spanish-language versions as well. Also, "Wikipedia for Schools", the Wikipedia series of CDs / DVDs produced by Wikipedians and SOS Children's Villages UK, SOS Children, is a free, hand-checked, non-commercial selection from Wikipedia targeted around the National Curriculum (UK), UK National Curriculum and intended to be useful for much of the English-speaking world. The project is available online; an equivalent print encyclopedia would require roughly 20 volumes. * Printed books: There are efforts to put a select subset of Wikipedia's articles into printed book form. Since 2009, tens of thousands of print on demand, print-on-demand books that reproduced English, German, Russian and French Wikipedia articles have been produced by the American company Books LLC and by three Mauritius, Mauritian subsidiaries of the German publisher VDM Publishing, VDM. * Semantic Web: The website DBpedia, begun in 2007, extracts data from the infoboxes and category declarations of the English-language Wikipedia. Wikimedia has created the Wikidata project with a similar objective of storing the basic facts from each page of Wikipedia and the other WMF wikis and make it available in a queriable Semantic Web, semantic format, Resource Description Framework, RDF. it has 93,337,731 items. Obtaining the full contents of Wikipedia for reuse presents challenges, since direct cloning via a web crawler is discouraged. Wikipedia publishes Wikipedia:Database download, "dumps" of its contents, but these are text-only; there was no dump available of Wikipedia's images.meta:Data dumps#Downloading Images, Data dumps: Downloading Images, Meta-Wiki meta:Wikimedia Enterprise, Wikimedia Enterprise is a for-profit solution to this. Several languages of Wikipedia also maintain a reference desk, where volunteers answer questions from the general public. According to a study by Pnina Shachaf in the ''Journal of Documentation'', the quality of the Wikipedia reference desk is comparable to a standard library reference desk, with an accuracy of 55 percent.


Mobile access

Wikipedia's original medium was for users to read and edit content using any standard web browser through a fixed Internet access, Internet connection. Although Wikipedia content has been accessible through the mobile web since July 2013, ''The New York Times'' on February 9, 2014, quoted Erik Möller, deputy director of the Wikimedia Foundation, stating that the transition of internet traffic from desktops to mobile devices was significant and a cause for concern and worry. The article in ''The New York Times'' reported the comparison statistics for mobile edits stating that, "Only 20 percent of the readership of the English-language Wikipedia comes via mobile devices, a figure substantially lower than the percentage of mobile traffic for other media sites, many of which approach 50 percent. And the shift to mobile editing has lagged even more." ''The New York Times'' reports that Möller has assigned "a team of 10 software developers focused on mobile", out of a total of approximately 200 employees working at the Wikimedia Foundation. One principal concern cited by ''The New York Times'' for the "worry" is for Wikipedia to effectively address attrition issues with the number of editors which the online encyclopedia attracts to edit and maintain its content in a mobile access environment. ''Bloomberg Businessweek'' reported in July 2014 that Google's Android mobile apps have dominated the largest share of global smartphone shipments for 2013 with 78.6% of market share over their next closest competitor in iOS with 15.2% of the market. At the time of the Tretikov appointment and her posted web interview with
Sue Gardner Sue Gardner (born May 11, 1967) is a Canadian journalist, not-for-profit executive and business executive. She was the executive director of the Wikimedia Foundation from December 2007 until May 2014, and before that was the director of the Can ...
in May 2014, Wikimedia representatives made a technical announcement concerning the number of mobile access systems in the market seeking access to Wikipedia. Directly after the posted web interview, the representatives stated that Wikimedia would be applying an all-inclusive approach to accommodate as many mobile access systems as possible in its efforts for expanding general mobile access, including BlackBerry and the Windows Phone system, making market share a secondary issue. The Android app for Wikipedia was released on July 23, 2014, to generally positive reviews, scoring over four of a possible five in a poll of approximately 200,000 users downloading from Google. The version for iOS was released on April 3, 2013, to similar reviews. Later versions have also been released. Access to Wikipedia from mobile phones was possible as early as 2004, through the Wireless Application Protocol (WAP), via the Wapedia service. In June 2007 Wikipedia launched en.mobile.wikipedia.org, an official website for wireless devices. In 2009 a newer mobile service was officially released, located at en.m.wikipedia.org, which caters to more advanced mobile devices such as the iPhone, Android (operating system), Android-based devices or WebOS-based devices. Several other methods of mobile access to Wikipedia have emerged. Many devices and applications optimize or enhance the display of Wikipedia content for mobile devices, while some also incorporate additional features such as use of Wikipedia metadata, such as geographic data and information, geoinformation. Wikipedia Zero was an initiative of the Wikimedia Foundation to expand the reach of the encyclopedia to the developing countries. It was discontinued in February 2018.
Andrew Lih Andrew Lih (; born 1968)Andrew Lih
"
MIT Technology Review ''MIT Technology Review'' is a bimonthly magazine wholly owned by the Massachusetts Institute of Technology, and editorially independent of the university. It was founded in 1899 as ''The Technology Review'', and was re-launched without "The" in ...
'' claims the bureaucratic structure and rules are a factor in this. Simonite alleges some Wikipedians use the labyrinthine rules and guidelines to dominate others and those editors have a vested interest in keeping the status quo. Lih alleges there is a serious disagreement among existing contributors on how to resolve this. Lih fears for Wikipedia's long-term future while Brown fears problems with Wikipedia will remain and rival encyclopedias will not replace it.


Chinese access

Access to the Chinese Wikipedia Internet censorship in China, has been blocked in mainland China since May 2015. This was done after Wikipedia started to use HTTPS encryption, which made selective censorship more difficult. In 2017, Quartz (publication), ''Quartz'' reported that the Chinese government had begun creating an unofficial version of Wikipedia. However, unlike Wikipedia, the website's contents would only be editable by scholars from state-owned Chinese institutions. The article stated it had been approved by the State Council of the People's Republic of China in 2011.


Cultural impact


Trusted source to combat fake news

In 2017–18, after a barrage of false news reports, both Facebook and YouTube announced they would rely on Wikipedia to help their users evaluate reports and reject false news. Noam Cohen, writing in ''The Washington Post'' states, "YouTube's reliance on Wikipedia to set the record straight builds on the thinking of another fact-challenged platform, the Facebook social network, which announced last year that Wikipedia would help its users root out '
fake news Fake news is false or misleading information presented as news. Fake news often has the aim of damaging the reputation of a person or entity, or making money through advertising revenue.Schlesinger, Robert (April 14, 2017)"Fake news in reality ...
'." Alexa records the daily pageviews per visitor as 3.03 and the average daily time on site as 3:46 minutes.


Readership

In February 2014, ''The New York Times'' reported that Wikipedia was ranked fifth globally among all websites, stating "With 18 billion page views and nearly 500 million unique visitors a month,... Wikipedia trails just Yahoo, Facebook, Microsoft and Google, the largest with 1.2 billion unique visitors." However, its ranking dropped to 13th globally by June 2020 due mostly to a rise in popularity of Chinese websites for online shopping. In addition to logistic function, logistic growth in the number of its articles, Wikipedia has steadily gained status as a general reference website since its inception in 2001. The number of readers of Wikipedia worldwide reached 365 million at the end of 2009. The Pew Research Center, Pew Internet and American Life project found that one third of US Internet users consulted Wikipedia. In 2011 ''
Business Insider ''Insider'', previously named ''Business Insider'' (''BI''), is an American financial and business news website founded in 2007. Since 2015, a majority stake in ''Business Insider''s parent company Insider Inc. has been owned by the German publ ...
'' gave Wikipedia a valuation of $4 billion if it ran advertisements. According to "Wikipedia Readership Survey 2011", the average age of Wikipedia readers is 36, with a rough parity between genders. Almost half of Wikipedia readers visit the site more than five times a month, and a similar number of readers specifically look for Wikipedia in search engine results. About 47 percent of Wikipedia readers do not realize that Wikipedia is a non-profit organization.


COVID-19 pandemic

During the COVID-19 pandemic, Wikipedia's coverage of the pandemic received international media attention, and brought an increase in Wikipedia readership overall.


Cultural significance

Wikipedia's content has also been used in academic studies, books, conferences, and court cases. The Parliament of Canada's website refers to Wikipedia's article on same-sex marriage in the "related links" section of its "further reading" list for the ''Civil Marriage Act''. The encyclopedia's assertions are increasingly used as a source by organizations such as the US federal courts and the World Intellectual Property Organization—though mainly for ''supporting information'' rather than information decisive to a case. Content appearing on Wikipedia has also been cited as a source and referenced in some United States Intelligence Community, US intelligence agency reports. In December 2008, the scientific journal ''RNA Biology'' launched a new section for descriptions of families of RNA molecules and requires authors who contribute to the section to also submit a draft article on the Rfam, RNA family for publication in Wikipedia. Wikipedia has also been used as a source in journalism, often without attribution, and several reporters have been dismissed for plagiarism from Wikipedia, plagiarizing from Wikipedia., ''San Antonio Express-News'', January 9, 2007. In 2006, Time (magazine), ''Time'' magazine recognized Wikipedia's participation (along with
YouTube YouTube is a global online video platform, online video sharing and social media, social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by ...
, Reddit, MySpace, and
Facebook Facebook is an online social media and social networking service owned by American company Meta Platforms. Founded in 2004 by Mark Zuckerberg with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin M ...
) in the rapid growth of online collaboration and interaction by millions of people worldwide. In July 2007, Wikipedia was the focus of a 30-minute documentary on BBC Radio 4 which argued that, with increased usage and awareness, the number of references to Wikipedia in popular culture is such that the word is one of a select group of 21st-century nouns that are so familiar (
Google Google LLC () is an American multinational technology company focusing on search engine technology, online advertising, cloud computing, computer software, quantum computing, e-commerce, artificial intelligence, and consumer electronics. ...
,
Facebook Facebook is an online social media and social networking service owned by American company Meta Platforms. Founded in 2004 by Mark Zuckerberg with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin M ...
,
YouTube YouTube is a global online video platform, online video sharing and social media, social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by ...
) that they no longer need explanation. On September 28, 2007, Italy, Italian politician Franco Grillini raised a parliamentary question with the minister of cultural resources and activities about the necessity of freedom of panorama. He said that the lack of such freedom forced Wikipedia, "the seventh most consulted website", to forbid all images of modern Italian buildings and art, and claimed this was hugely damaging to tourist revenues. On September 16, 2007, ''The Washington Post'' reported that Wikipedia had become a focal point in the 2008 United States presidential election, 2008 US election campaign, saying: "Type a candidate's name into Google, and among the first results is a Wikipedia page, making those entries arguably as important as any ad in defining a candidate. Already, the presidential entries are being edited, dissected and debated countless times each day." An October 2007 Reuters article, titled "Wikipedia page the latest status symbol", reported the recent phenomenon of how having a Wikipedia article vindicates one's notability. Active participation also has an impact. Law students have been assigned to write Wikipedia articles as an exercise in clear and succinct writing for an uninitiated audience. A working group led by Peter Stone (professor), Peter Stone (formed as a part of the Stanford-based project One Hundred Year Study on Artificial Intelligence) in its report called Wikipedia "the best-known example of crowdsourcing... that far exceeds traditionally-compiled information sources, such as encyclopedias and dictionaries, in scale and depth". In a 2017 opinion piece for ''Wired (magazine), Wired'', Hossein Derakhshan describes Wikipedia as "one of the last remaining pillars of the openness, open and decentralization#Centralization and redecentralization of the Internet, decentralized web" and contrasted its existence as a text-based source of knowledge with social media and social networking services, the latter having "since colonized the web for television's values". For Derakhshan, Wikipedia's goal as an encyclopedia represents the Age of Enlightenment tradition of rationality triumphing over emotions, a trend which he considers "endangered" due to the "gradual shift from a typography, typographic culture to a photographic one, which in turn mean[s] a shift from rationality to emotions, exposition to entertainment". Rather than "" (), social networks have led to a culture of "dare not to care to know". This is while Wikipedia faces "a more concerning problem" than funding, namely "a flattening growth rate in the number of contributors to the website". Consequently, the challenge for Wikipedia and those who use it is to "save Wikipedia and its promise of a free and open collection of all human knowledge amid the conquest of new and old television—how to collect and preserve knowledge when nobody cares to know."


Awards

Wikipedia won two major awards in May 2004.m:Trophy box, "Trophy box", (March 28, 2005). The first was a Golden Nica for Digital Communities of the annual Prix Ars Electronica contest; this came with a €10,000 (£6,588; $12,700) grant and an invitation to present at the PAE Cyberarts Festival in Austria later that year. The second was a Judges' Webby Award for the "community" category. In 2007, readers of brandchannel.com voted Wikipedia as the fourth-highest brand ranking, receiving 15 percent of the votes in answer to the question "Which brand had the most impact on our lives in 2006?" In September 2008, Wikipedia received Quadriga (award), Quadriga ''A Mission of Enlightenment'' award of Werkstatt Deutschland along with Boris Tadić, Eckart Höfling, and Peter Gabriel. The award was presented to Wales by David Weinberger. In 2015, Wikipedia was awarded both the annual Erasmus Prize, which recognizes exceptional contributions to culture, society or social sciences, and the Spain, Spanish Princess of Asturias Award on International Cooperation. Speaking at the Asturian Parliament in Oviedo, the city that hosts the awards ceremony,
Jimmy Wales Jimmy Donal Wales (born August 7, 1966), also known on Wikipedia by the pseudonym Jimbo, is an American-British Internet entrepreneur, webmaster, and former financial trader. He is a co-founder of the online non-profit encyclopedia Wikipedi ...
praised the work of the Asturian language Wikipedia users.


Satire

Many parodies target Wikipedia's openness and susceptibility to inserted inaccuracies, with characters vandalizing or modifying the online encyclopedia project's articles. Comedian
Stephen Colbert Stephen Tyrone Colbert ( ; born May 13, 1964) is an American comedian, writer, producer, political commentator, actor, and television host. He is best known for hosting the satirical Comedy Central program ''The Colbert Report'' from 2005 to ...
has parodied or referenced Wikipedia on numerous episodes of his show ''
The Colbert Report ''The Colbert Report'' ( ) is an American late-night talk and news satire television program hosted by Stephen Colbert that aired four days a week on Comedy Central from October 17, 2005, to December 18, 2014, for 1,447 episodes. The show focuse ...
'' and coined the related term ''wikiality'', meaning "together we can create a reality that we all agree on—the reality we just agreed on". Another example can be found in "Wikipedia Celebrates 750 Years of American Independence", a July 2006 front-page article in ''The Onion'', as well as the 2010 ''The Onion'' article "'L.A. Law' Wikipedia Page Viewed 874 Times Today". In an April 2007 episode of the American television comedy The Office (American TV series), ''The Office'', office manager (Michael Scott (The Office), Michael Scott) is shown relying on a hypothetical Wikipedia article for information on negotiation tactics to assist him in negotiating lesser pay for an employee. Viewers of the show tried to add the episode's mention of the page as a section of the actual Wikipedia article on negotiation, but this effort was prevented by other users on the article's talk page. "My Number One Doctor", a 2007 episode of the television show ''Scrubs (TV series), Scrubs'', played on the perception that Wikipedia is an unreliable reference tool with a scene in which Perry Cox reacts to a patient who says that a Wikipedia article indicates that the raw food diet reverses the effects of bone cancer by retorting that the same editor who wrote that article also wrote the list of Battlestar Galactica (2004 TV series) episodes, ''Battlestar Galactica'' episode guide.Bakken, Janae. "My Number One Doctor"; ''Scrubs (TV series), Scrubs''; American Broadcasting Company, ABC; December 6, 2007. In 2008, the comedy website ''CollegeHumor'' produced a video sketch named "Professor Wikipedia", in which the fictitious Professor Wikipedia instructs a class with a medley of unverifiable and occasionally absurd statements. The ''Dilbert'' comic strip from May 8, 2009, features a character supporting an improbable claim by saying "Give me ten minutes and then check Wikipedia." In July 2009, BBC Radio 4 broadcast a comedy series called ''Bigipedia'', which was set on a website which was a parody of Wikipedia. Some of the sketches were directly inspired by Wikipedia and its articles. On August 23, 2013, the ''The New Yorker, New Yorker'' website published a cartoon with this caption: "Dammit, Chelsea Manning, Manning, have you considered the pronoun war that this is going to start on your Wikipedia page?" The cartoon referred to Chelsea Elizabeth Manning (born Bradley Edward Manning), an American activist, politician, and former United States Army soldier and a trans woman. In December 2015, John Julius Norwich stated, in a letter published in ''The Times'' newspaper, that as a historian he resorted to Wikipedia "at least a dozen times a day", and had never yet caught it out. He described it as "a work of reference as useful as any in existence", with so wide a range that it is almost impossible to find a person, place, or thing that it has left uncovered and that he could never have written his last two books without it.


Sister projectsWikimedia

Wikipedia has spawned several sister projects, which are also wikis run by the
Wikimedia Foundation The Wikimedia Foundation, Inc., or Wikimedia for short and abbreviated as WMF, is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California and registered as a charitable foundation under local laws. Best kno ...
. These other Wikimedia projects include
Wiktionary Wiktionary ( , , rhyming with "dictionary") is a multilingual, web-based project to create a free content dictionary of terms (including words, phrases, proverbs, linguistic reconstructions, etc.) in all natural languages and in a number ...
, a dictionary project launched in December 2002, Wikiquote, a collection of quotations created a week after Wikimedia launched,
Wikibooks Wikibooks (previously called ''Wikimedia Free Textbook Project'' and ''Wikimedia-Textbooks'') is a wiki-based Wikimedia project hosted by the Wikimedia Foundation for the creation of free content digital textbooks and annotated texts that any ...
, a collection of collaboratively written free textbooks and annotated texts,
Wikimedia Commons Wikimedia Commons (or simply Commons) is a media repository of free-to-use images, sounds, videos and other media. It is a project of the Wikimedia Foundation. Files from Wikimedia Commons can be used across all of the Wikimedia projects in ...
, a site devoted to free-knowledge multimedia, Wikinews, for citizen journalism, and Wikiversity, a project for the creation of free learning materials and the provision of online learning activities. Another sister project of Wikipedia, Wikispecies, is a catalogue of species. In 2012 Wikivoyage, an editable travel guide, and Wikidata, an editable knowledge base, launched.


Publishing

The most obvious economic effect of Wikipedia has been the death of commercial encyclopedias, especially the printed versions, e.g. ''
Encyclopædia Britannica The (Latin for "British Encyclopædia") is a general knowledge English-language encyclopaedia. It is published by Encyclopædia Britannica, Inc.; the company has existed since the 18th century, although it has changed ownership various time ...
'', which were unable to compete with a product that is essentially free. Nicholas G. Carr, Nicholas Carr wrote a 2005 essay, "The amorality of Web 2.0", that criticized websites with user-generated content, like Wikipedia, for possibly leading to professional (and, in his view, superior) content producers' going out of business, because "free trumps quality all the time". Carr wrote: "Implicit in the ecstatic visions of Web 2.0 is the hegemony of the amateur. I for one can't imagine anything more frightening." Others dispute the notion that Wikipedia, or similar efforts, will entirely displace traditional publications. For instance, Chris Anderson (writer), Chris Anderson, the editor-in-chief of ''Wired (magazine), Wired Magazine'', wrote in ''Nature (journal), Nature'' that the "wisdom of the crowd, wisdom of crowds" approach of Wikipedia will not displace top scientific journals, with their rigorous peer review process. There is also an ongoing debate about the influence of Wikipedia on the biography publishing business. "The worry is that, if you can get all that information from Wikipedia, what's left for biography?" said Kathryn Hughes, professor of life writing at the University of East Anglia and author of ''The Short Life and Long Times of Mrs Beeton'' and ''George Eliot: the Last Victorian''.


Research use

Wikipedia has been widely used as a text corpus, corpus for linguistic research in computational linguistics, information retrieval and natural language processing. In particular, it commonly serves as a target knowledge base for the entity linking problem, which is then called "wikification", and to the related problem of word-sense disambiguation. Methods similar to wikification can in turn be used to find "missing" links in Wikipedia. In 2015, French researchers José Lages of the University of Franche-Comté in Besançon and Dima Shepelyansky of Paul Sabatier University in Toulouse published a global university ranking based on Wikipedia scholarly citations. They used PageRank, CheiRank and similar algorithms "followed by the number of appearances in the 24 different language editions of Wikipedia (descending order) and the century in which they were founded (ascending order)". The study was updated in 2019. A 2017 MIT study suggests that words used on Wikipedia articles end up in scientific publications. Studies related to Wikipedia have been using machine learning and artificial intelligence to support various operations. One of the most important areas—automatic detection of vandalism and data quality assessment in Wikipedia. In February 2022, Civil Service (United Kingdom), civil servants from the UK's Department for Levelling Up, Housing and Communities were found to have used Wikipedia for research in the drafting of the Levelling up policy of the Boris Johnson government, Levelling Up Levelling Up White Paper, White Paper after journalists at ''The Independent'' noted that parts of the White paper#In government, document had been lifted directly from Wikipedia articles on Constantinople and the list of largest cities throughout history.


Related projects

Several interactive multimedia encyclopedias incorporating entries written by the public existed long before Wikipedia was founded. The first of these was the 1986 BBC Domesday Project, which included text (entered on BBC Micro computers) and photographs from more than a million contributors in the UK, and covered the geography, art, and culture of the UK. This was the first interactive multimedia encyclopedia (and was also the first major multimedia document connected through internal links), with the majority of articles being accessible through an interactive map of the UK. The user interface and part of the content of the Domesday Project were emulated on a website until 2008. Several free-content, collaborative encyclopedias were created around the same period as Wikipedia (e.g. Everything2), with many later being merged into the project (e.g. GNE (encyclopedia), GNE).The Free Encyclopedia Project
gnu.org ( )
One of the most successful early online encyclopedias incorporating entries by the public was h2g2, which was created by Douglas Adams in 1999. The h2g2 encyclopedia is relatively lighthearted, focusing on articles which are both witty and informative. Subsequent collaborative knowledge base, knowledge websites have drawn inspiration from Wikipedia. Others use more traditional peer review, such as ''Encyclopedia of Life'' and the online wiki encyclopedias ''Scholarpedia'' and Citizendium. The latter was started by Sanger in an attempt to create a reliable alternative to Wikipedia.


See also

* Democratization of knowledge * Interpedia, an early proposal for a collaborative Internet encyclopedia * List of online encyclopedias * List of Wikipedia controversies * Network effect * Outline of Wikipediaguide to the subject of ''Wikipedia'' presented as a tree structured list of its subtopics; for an outline of the contents of Wikipedia, see Portal:Contents/Outlines * QRpediamultilingual, mobile interface to Wikipedia * Wikipedia Review


Notes


References


Further reading


Academic studies

* * * *
A blog post by the author.
* * * * * (Open access) * Roy Rosenzweig, Rosenzweig, Roy
Can History be Open Source? Wikipedia and the Future of the Past
(Originally published in ''The Journal of American History'' 93.1 (June 2006): 117–146.) * * *


Books

* (Substantial criticisms of Wikipedia and other web 2.0 projects.) ** Listen to: *** The NPR interview with A. Keen, Weekend Edition Saturday, June 16, 2007. * * (See book review by Baker, as listed hereafter.) * * * * * * * * *


Book review–related articles

* Nicholson Baker, Baker, Nicholson
"The Charms of Wikipedia"
''The New York Review of Books'', March 20, 2008. Retrieved December 17, 2008. (Book rev. of ''The Missing Manual'', by John Broughton, as listed previously.) * L. Gordon Crovitz, Crovitz, L. Gordon
"Wikipedia's Old-Fashioned Revolution: The online encyclopedia is fast becoming the best."
(Originally published in The Wall Street Journal, ''Wall Street Journal'' onlineApril 6, 2009.) * Virginia Postrel, Postrel, Virginia
"Who Killed Wikipedia? : A hardened corps of volunteer editors is the only force protecting Wikipedia. They might also be killing it"
''Pacific Standard'', November/December 2014 issue.


Other media coverage

* * * * * * * * * *
"Wikipedia probe into paid-for 'sockpuppet' entries"
BBC News, October 21, 2013.
"The Decline of Wikipedia"
, ''MIT Technology Review'', October 22, 2013
"Edits to Wikipedia pages on Bell, Garner, Diallo traced to 1Police Plaza"
(March 2015), ''Media in New York's Capital District, Capital''
Angola's Wikipedia Pirates Are Exposing Problems
(March 2016), ''Vice (magazine), Motherboard'' * ''Full Measure with Sharyl Attkisson'', April 17, 2016. (Includes video.) *
The Great Book of Knowledge, Part 1: A Wiki is a Kind of Bus
''Ideas (radio show), Ideas, with Paul Kennedy'', CBC Radio One, originally broadcast January 15, 2014. The webpage includes a link to the archived audio program (als
found here
. The radio documentary discusses Wikipedia's history, development, and its place within the broader scope of the trend to democratized knowledge. It also includes interviews with several key Wikipedia staff and contributors, including Kat Walsh and
Sue Gardner Sue Gardner (born May 11, 1967) is a Canadian journalist, not-for-profit executive and business executive. She was the executive director of the Wikimedia Foundation from December 2007 until May 2014, and before that was the director of the Can ...
(audio, 53:58, Flash required).
"So Is Wikipedia Cracking Up?"
''The Independent'', February 3, 2009.
Wikipedia's Year-End List Shows What the Internet Needed to Know in 2019
Alyse Stanley, December 27, 2019, Gizmodo.


External links

* – multilingual portal (contains links to all language editions) * *
Wikipedia
topic page at ''
The New York Times ''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid ...
''
Video of TED talk by Jimmy Wales on the birth of Wikipedia
* {{Authority control Wikipedia, 2001 establishments in the United States Advertising-free websites Articles containing video clips Creative Commons-licensed websites Free-content websites Internet properties established in 2001 Jimmy Wales Multilingual websites Online encyclopedias Social information processing Wikimedia projects