Wikipedia (// (listen) wik-ih-PEE-dee-ə or // (listen) wik-ee-PEE-dee-ə; abbreviated as WP) is a multilingual online encyclopedia created and maintained as an open collaboration project by a community of volunteer editors using a wiki-based editing system. It is the largest and most popular general reference work on the World Wide Web. It is also one of the 15 most popular websites ranked by Alexa, as of June 2020[update]. It features exclusively free content and no commercial ads and is owned and supported by the Wikimedia Foundation, a non-profit organization funded primarily through donations.
was launched on January 15, 2001, and was created by Jimmy Wales and Larry Sanger. Sanger coined its name as a portmanteau of the words "wiki" (Hawaiian for "quick") and "encyclopedia". Initially an English-language encyclopedia, versions of in other languages were quickly developed. With 6.1 million articles, the English is the largest of the more than 300 encyclopedias. Overall, comprises more than 54 million articles attracting 1.5 billion unique visitors per month.
In 2005, Nature published a peer review comparing 42 hard science articles from Encyclopædia Britannica and and found that's level of accuracy approached that of Britannica, although critics suggested that it might not have fared so well in a similar study of a random sampling of all articles or one focused on social science or contentious social issues. The following year, Time magazine stated that the open-door policy of allowing anyone to edit had made the biggest and possibly the best encyclopedia in the world, and was a testament to the vision of Jimmy Wales.
has been criticized for exhibiting systemic bias and for being subject to manipulation and spin in controversial topics; Edwin Black has criticized for presenting a mixture of "truth, half truth, and some falsehoods". has also been criticized for gender bias, particularly on its English-language version, where the dominant majority of editors are male. However, edit-a-thons have been held to encourage female editors and increase the coverage of women's topics. Facebook announced that by 2017 it would help readers detect fake news by suggesting links to related articles. YouTube announced a similar plan in 2018.
Other collaborative online encyclopedias were attempted before, but none were as successful. began as a complementary project for Nupedia, 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, a web portal company. Its main figures were Bomis CEO Jimmy Wales and Larry Sanger, editor-in-chief for Nupedia and later. Nupedia was initially licensed under its own Nupedia Open Content License, but even before was founded, Nupedia switched to the GNU Free Documentation License at the urging of Richard Stallman. Wales is credited with defining the goal of making a publicly editable encyclopedia, while Sanger is credited with the strategy of using a wiki 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.
The domains wikipedia.com and wikipedia.org were registered on January 12, 2001 and January 13, 2001 respectively, and 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.'s policy of "neutral point-of-view" was codified in its first few months. Otherwise, there were relatively few rules initially and operated independently of Nupedia. Originally, Bomis intended to make a business for profit.
gained early contributors from Nupedia, Slashdot postings, and web search engine indexing. Language editions were also created, with a total of 161 by the end of 2004. Nupedia and coexisted until the former's servers were taken down permanently in 2003, and its text was incorporated into. The English passed the mark of two million articles on September 9, 2007, making it the largest encyclopedia ever assembled, surpassing the 1408 Yongle Encyclopedia, which had held the record for almost 600 years.
Citing fears of commercial advertising and lack of control in Wikipedia, users of the Spanish forked from to create the Enciclopedia Libre in February 2002. These moves encouraged Wales to announce that would not display advertisements, and to change's domain from wikipedia.com to wikipedia.org. Brion Vibber applied the change on August 15, 2002.
Though the English reached three million articles in August 2009, the growth of the edition, in terms of the numbers of new articles and of contributors, 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 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"—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 in Madrid found that the English had lost 49,000 editors during the first three months of 2009; in comparison, the project 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. Wales disputed these claims in 2009, denying the decline and questioning the methodology of the study. Two years later, in 2011, Wales acknowledged the presence of 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, Wales also claimed the number of editors was "stable and sustainable". A 2013 article titled "The Decline of" in MIT's Technology Review questioned this claim. The article revealed that since 2007, had lost a third of its volunteer editors, and those still there have focused increasingly on minutiae. In July 2012, The Atlantic reported that the number of administrators is also in decline. In the November 25, 2013, issue of New York magazine, Katherine Ward stated "Wikipedia, the sixth-most-used website, is facing an internal crisis".
In January 2007, entered for the first time the top-ten list of the most popular websites in the US, according to comScore Networks. With 42.9 million unique visitors, was ranked number 9, surpassing The New York Times (#10) and Apple (#11). This marked a significant increase over January 2006, when the rank was number 33, with receiving around 18.3 million unique visitors. As of March 2020[update], has rank 13 among websites in terms of popularity according to Alexa Internet. In 2014, it received eight billion pageviews every month. On February 9, 2014, The New York Times reported that has 18 billion page views and nearly 500 million unique visitors a month, "according to the ratings firm comScore". Loveland and Reagle argue that, in process, follows a long tradition of historical encyclopedias that accumulated improvements piecemeal through "stigmergic accumulation".
On January 18, 2012, the English participated in a series of coordinated protests against two proposed laws in the United States Congress—the Stop Online Piracy Act (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 content.
On January 20, 2014, Subodh Varma reporting for The Economic Times indicated that not only had'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 declined by twelve percent, those of German version slid by 17 percent and the Japanese version lost nine percent." Varma added that, "While's managers think that this could be due to errors in counting, other experts feel that Google's Knowledge Graphs project launched last year may be gobbling up users." When contacted on this matter, Clay Shirky, associate professor at New York University and fellow at Harvard's Berkman Center for Internet & Society indicated 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 [any further]." By the end of December 2016, was ranked fifth in the most popular websites globally.
In January 2013, 274301, an asteroid, was named after; in October 2014, was honored with the Monument; and, in July 2015, became available as 7,473 books for $500,000. In 2019, a species of flowering plant was named Viola. In April 2019, an Israeli lunar lander, Beresheet, crash landed on the surface of the Moon carrying a copy of nearly all of the English 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 have been encoded into synthetic DNA.
Unlike traditional encyclopedias, follows the procrastination principle[note 3] regarding the security of its content. It started almost entirely open—anyone could create articles, and any article could be edited by any reader, even those who did not have a account. Modifications to all articles would be published immediately. As a result, any article could contain inaccuracies such as errors, ideological biases, and nonsensical or irrelevant text.
Due to the increasing popularity of, some editions, including the English version, have introduced editing restrictions in some cases. For instance, on the English and some other language editions, only registered users may create a new article. On the English, among others, some particularly controversial, sensitive and/or vandalism-prone pages have been protected to some degree. A frequently vandalized article can be semi-protected or extended confirmed protected, meaning that only autoconfirmed or extended confirmed editors are able to modify it. A particularly contentious article may be locked so that only administrators are able to make changes.
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 maintains "stable versions" of articles, which have passed certain reviews. Following protracted trials and community discussion, the English 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.
Although changes are not systematically reviewed, the software that powers provides certain tools allowing anyone to review changes made by others. The "History" page of each article links to each revision.[note 4] 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 may maintain a "watchlist" of articles that interest them so they can be notified of any changes. "New pages patrol" is a process whereby newly created articles are checked for obvious problems.
In 2003, economics Ph.D. student Andrea Ciffolilli argued that the low transaction costs of participating in a wiki create a catalyst for collaborative development, and that features such as allowing easy access to past versions of a page favor "creative construction" over "creative destruction".
Any change or edit that manipulates content in a way that purposefully compromises the integrity of is considered vandalism. The most common and obvious types of vandalism include additions of obscenities and crude humor. Vandalism 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 to an article can be more difficult to detect. Vandals can introduce irrelevant formatting, modify page semantics such as the page's title or categorization, manipulate the underlying code of an article, or use images disruptively.
In the Seigenthaler biography incident, an anonymous editor introduced false information into the biography of American political figure John Seigenthaler in May 2005. Seigenthaler was falsely presented as a suspect in the assassination of John F. Kennedy. The article remained uncorrected for four months. Seigenthaler, the founding editorial director of USA Today and founder of the Freedom Forum First Amendment Center at Vanderbilt University, called co-founder Jimmy Wales and asked whether he had any way of knowing who contributed the misinformation. Wales replied that he did not, although the perpetrator was eventually traced. After the incident, Seigenthaler described as "a flawed and irresponsible research tool". This incident led to policy changes at, specifically targeted at tightening up the verifiability of biographical articles of living people.
Wikipedians often have disputes regarding content, which may result in repeatedly making opposite changes to an article, known as "edit warring". The process is a resource-consuming scenario where no useful knowledge is added. This practice is also criticized as creating a competitive, conflict based editing culture associated with traditional masculine gender roles, which contributes to the gender bias on.
Special interest groups have engaged in edit wars to advance their own political interests. Defending Israeli settlements in the West Bank, numerous pro-occupation groups have launched "Zionist editing" campaigns. In 2010, the then-director general of the Yesha Council and former Israeli Cabinet Minister Naftali Bennett described their goal "as not to make rightist but for it to include our point of view".
|Wikimania, 60 Minutes, CBS, 20 minutes, April 5, 2015, co-founder Jimmy Wales at Fosdem|
Content in is subject to the laws (in particular, copyright laws) of the United States and of the US state of Virginia, where the majority of's servers are located. Beyond legal matters, the editorial principles of are embodied in the "five pillars" and in numerous policies and guidelines intended to appropriately shape content. Even these rules are stored in wiki form, and editors write and revise the website's policies and guidelines. Editors can enforce these rules by deleting or modifying non-compliant material. Originally, rules on the non-English editions of were based on a translation of the rules for the English. They have since diverged to some extent.
According to the rules on the English, each entry in must be about a topic that is encyclopedic and is not a dictionary entry or dictionary-style. A topic should also meet Wikipedia's standards of "notability", 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, 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. Among 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. This can at times lead to the removal of information that, though valid, is not properly sourced. Finally, must not take sides. All opinions and viewpoints, if attributable to external sources, must enjoy an appropriate share of coverage within an article. This is known as neutral point of view (NPOV).
Wikipedia's initial anarchy 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.
Editors in good standing in the community can run for one of many levels of volunteer stewardship: this begins with "administrator", privileged users who can delete pages, prevent articles from being changed in case of vandalism or editorial disputes (setting protective measures on articles), and try to prevent certain people from editing. Despite the name, 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 certain persons from making disruptive edits (such as vandalism).
Fewer editors become administrators than in years past, in part because the process of vetting potential administrators has become more rigorous.
Bureaucrats name new administrators solely upon the recommendations from the community.
Over time, has developed a semi-formal dispute resolution process to assist in such circumstances. In order to determine community consensus, editors can raise issues at appropriate community forums,[note 5] or seek outside input through third opinion requests or by initiating a more general community discussion known as a "request for comment".
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 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 (16%). Complete bans from are generally limited to instances of impersonation and anti-social behavior. 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.
Each article and each user of has an associated "Talk" page. These form the primary communication channel for editors to discuss, coordinate and debate.
Wikipedia's community has been described as cultlike, although not always with entirely negative connotations. The project's preference for cohesiveness, even if it requires compromise that includes disregard of credentials, has been referred to as "anti-elitism".
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.
does not require that its editors and contributors provide identification. As grew, "Who writes?" became one of the questions frequently asked on the project. Jimmy Wales once argued that only "a community ... a dedicated group of a few hundred volunteers" makes the bulk of contributions to 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 users are responsible for about half of the site's edits." This method of evaluating contributions was later disputed by Aaron Swartz, 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.
Editors who fail to comply with cultural rituals, such as signing talk page comments, may implicitly signal that they are outsiders, increasing the odds that insiders may target or discount their contributions. Becoming a insider involves non-trivial costs: the contributor is expected to learn-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, 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 addresses cannot be attributed to a particular editor with certainty.
A 2007 study by researchers from Dartmouth College found that "anonymous and infrequent contributors to [...] are as reliable a source of knowledge as those contributors who register with the site". Jimmy Wales stated in 2009 that "[I]t turns out over 50% of all the edits are done by just .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 editor and journalist Henry Blodget showed in 2009 that in a random sample of articles, most content in (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 thatns 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 community to new content".
Several studies have shown that most of the contributors are male. Notably, the results of a Wikimedia Foundation survey in 2008 showed that only 13 percent of editors were female. Because of this, universities throughout the United States tried to encourage females to become contributors. Similarly, many of these universities, including Yale and Brown, gave college credit to students who create or edit an article relating to women in science or technology. Andrew Lih, a professor and scientist, wrote in The New York Times 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 editors.
There are currently 310 language editions of (also called language versions, or simply Wikipedias). As of July 2020, the six largest, in order of article count, are the English, Cebuano, Swedish, German, French, and Dutchs. The second and third largests owe their position to the article-creating bot Lsjbot, which as of 2013 had created about half the articles in the Swedish, and most of the articles in the Cebuano and Warays. The latter are both languages of the Philippines.
In addition to the top six, eleven others have more than a million articles each (Russian, Italian, Spanish, Polish, Waray, Vietnamese, Japanese, Chinese, Arabic, Portuguese and Ukrainian), six more have over 500,000 articles (Persian, Catalan, Serbian, Egyptian Arabic, Norwegian Bokmål and Indonesian), 43 more have over 100,000, and 83 more have over 10,000. The largest, the English, has over 6.1 million articles. As of January 2019[update], according to Alexa, the English subdomain (en.wikipedia.org; English) receives approximately 57% of's cumulative traffic, with the remaining split among the other languages (Russian: 9%; Chinese: 6%; Japanese: 6%; Spanish: 5%).
The unit for the numbers in bars is articles.
Since is based on the Web 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 (e.g. colour versus color) 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.
Jimmy Wales has described 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". 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 (and others). For instance, Meta-Wiki provides important statistics on all language editions of, and it maintains a list of articles every 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 notability criteria of other language 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 from different regions of the world. It reported that the proportion of the edits made from North America was 51% for the English, and 25% for the simple English.
On March 1, 2014, The Economist, in an article titled "The Future of", cited a trend analysis concerning data published by Wikimedia stating that "[t]he number of editors for the English-language version has fallen by a third in seven years." The attrition rate for active editors in English was cited by The Economist as substantially in contrast to statistics for in other languages (non-English). The Economist reported that the number of contributors with an average of five or more edits per month was relatively constant since 2008 for 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, by sharp comparison, was cited as peaking in 2007 at approximately 50,000 and dropping to 30,000 by the start of 2014.
Should this attrition have continued unabated at the quoted trend rate of approximately 20,000 editors lost within a seven-year stretch, by 2021 there would be only 10,000 active editors on English. In contrast, the trend analysis published in The Economist presents in other languages (non-English) as successful in retaining their 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 in other languages (non-English) would provide a possible alternative to English for effectively ameliorating substantial editor attrition rates on the English-language.
This section needs to be updated.March 2018)(
Critics have stated that exhibits systemic bias. In 2010, columnist and journalist Edwin Black described as being a mixture of "truth, half-truth, and some falsehoods". Articles in The Chronicle of Higher Education and The Journal of Academic Librarianship have criticized's Undue Weight policy, concluding that the fact that 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 and Edwin Black 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 Journal concluded that as a resource about controversial topics, is subject to manipulation and spin.
|The Great Book of Knowledge, Part 1, Ideas with Paul Kennedy, CBC, January 15, 2014|
Articles for traditional encyclopedias such as Encyclopædia Britannica are carefully and deliberately written by experts, lending such encyclopedias a reputation for accuracy. However, a peer review in 2005 of forty-two scientific entries on both and Encyclopædia Britannica by the science journal Nature found few differences in accuracy, and concluded that "the average science entry in contained around four inaccuracies; Britannica, about three." Reagle suggested that while the study reflects "a topical strength of contributors" in science articles, "may not have fared so well using a random sampling of articles or on humanities subjects." 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 intervals), and a lack of study "statistical power" (i.e., owing to small sample size, 42 or 4 × 101 articles compared, vs >105 and >106 set sizes for Britannica and the English, respectively).
As a consequence of the open structure, "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 that results from users' anonymity, the insertion of false information, vandalism, and similar problems.
Economist Tyler Cowen wrote: "If I had to guess whether or the median refereed journal article on economics was more likely to be true after a not so long think I would opt for." 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 and relevant information is 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.
Critics argue that's open nature and a lack of proper sources for most of the information makes it unreliable. Some commentators suggest that may be reliable, but that the reliability of any given article is not clear. Editors of traditional reference works such as the Encyclopædia Britannica have questioned the project's utility and status as an encyclopedia. co-founder Jimmy Wales has claimed that has largely avoided the problem of "fake news" because the community regularly debates the quality of sources in articles.
|Inside—Attack of the PR Industry, Deutsche Welle, 7:13 mins|
A Harvard law textbook, Legal Research in a Nutshell (2011), cites 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".
Most university lecturers discourage students from citing any encyclopedia in academic work, preferring primary sources; some specifically prohibit 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 emails weekly from students saying they got failing grades on papers because they cited; he told the students they got what they deserved. "For God's sake, you're in college; don't cite the encyclopedia," he said.
In February 2007, an article in The Harvard Crimson newspaper reported that a few of the professors at Harvard University were including articles in their syllabi, although without realizing the articles might change. In June 2007, former president of the American Library Association Michael Gorman condemned, along with Google, stating that academics who endorse the use of are "the intellectual equivalent of a dietitian who recommends a steady diet of Big Macs with everything".
In contrast, academic writing in 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. Some academics suggest ‘Verifiability by respected sources’ as an indicator for assessing the quality of articles at the higher education level.
On March 5, 2014, Julie Beck writing for The Atlantic magazine in an article titled "Doctors' #1 Source for Healthcare Information:", 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." Beck continued to detail in this article new programs of Amin Azzam at the University of San Francisco to offer medical school courses to medical students for learning to edit and improve articles on health-related issues, as well as internal quality control programs within organized by James Heilman to improve a group of 200 health-related articles of central medical importance up to'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 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: "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's medical articles have passed."
In 2008, researchers at Carnegie Mellon University found that the quality of a article would suffer rather than gain from adding more writers when the article lacked appropriate explicit or implicit coordination. For instance, when contributors rewrite small portions of an entry rather than making full-length revisions, high- and low-quality content may be intermingled within an entry. Roy Rosenzweig, a history professor, stated that American National Biography Online outperformed in terms of its "clear and engaging prose", which, he said, was an important aspect of good historical writing. Contrasting's treatment of Abraham Lincoln to that of Civil War historian James McPherson in American National Biography Online, he said that both were essentially accurate and covered the major episodes in Lincoln's life, but praised "McPherson's richer contextualization [...] his artful use of quotations to capture Lincoln's voice [...] and [...] his ability to convey a profound message in a handful of words." By contrast, he gives an example of's prose that he finds "both verbose and dull". Rosenzweig also criticized the "waffling—encouraged by the NPOV policy—[which] means that it is hard to discern any overall interpretive stance in history". While generally praising the article on William Clarke Quantrill, he quoted its conclusion as an example of such "waffling", which then stated: "Some historians [...] remember him as an opportunistic, bloodthirsty outlaw, while others continue to view him as a daring soldier and local folk hero."
Other critics have made similar charges that, even if articles are factually accurate, they are often written in a poor, almost unreadable style. Frequent critic Andrew Orlowski commented, "Even when a entry is 100 percent factually correct, and those facts have been carefully chosen, it all too often reads as if it has been translated from one language to another then into a third, passing an illiterate translator at each stage." A study of articles on cancer was conducted in 2010 by Yaacov Lawrence of the Kimmel Cancer Center at Thomas Jefferson University. The study was limited to those articles that could be found in the Physician Data Query and excluded those written at the "start" class or "stub" class level. Lawrence found the articles accurate but not very readable, and thought that "Wikipedia's lack of readability (to non-college readers) may reflect its varied origins and haphazard editing". The Economist argued that better-written articles tend to be more reliable: "inelegant or ranting prose usually reflects muddled thoughts and incomplete information".
Parts of this article (those related to d:Wikidata:Statistics/Wikipedia) need to be updated. (March 2017)
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 terabytes 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 is under constant review by its editors, and disagreements are not uncommon (see deletionism and inclusionism). contains materials that some people may find objectionable, offensive, or pornographic. The 'is not censored' policy has sometimes proved controversial: in 2008, rejected an online petition against the inclusion of images of Muhammad in the English edition of its Muhammad article, citing this policy. The presence of politically, religiously, and pornographically sensitive materials in has led to the censorship of 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:
These numbers refer only to the quantity 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 "Loves Libraries" program, has partnered with major public libraries such as the New York Public Library for the Performing Arts to expand its coverage of underrepresented subjects and articles.
A 2011 study conducted by researchers at the University of Minnesota 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.
Research conducted by Mark Graham of the Oxford Internet Institute in 2009 indicated that the geographic distribution of article topics is highly uneven. Africa is most underrepresented. Across 30 language editions of, historical articles and sections are generally Eurocentric and focused on recent events.
An editorial in The Guardian in 2014 claimed that more effort went into providing references for a list of female porn actors than a list of women writers. Data has also shown that Africa-related material often faces omission; a knowledge gap that a July 2018 Wikimedia conference in Cape Town sought to address.
When multiple editors contribute to one topic or set of topics, systemic bias 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" discussed the effect of systemic bias and policy creep on the downward trend in the number of editors.
Systemic bias on may follow that of culture generally,[vague] for example favoring certain nationalities, ethnicities or majority religions. It may more specifically follow the biases of Internet culture, inclining to being young, male, English-speaking, educated, technologically aware, and wealthy enough to spare time for editing. Biases of its own may include over-emphasis on topics such as pop culture, technology, and current events.
Taha Yasseri of the University of Oxford, in 2013, studied the statistical trends of systemic bias at introduced by editing conflicts and their resolution. His research examined the counterproductive work behavior of edit warring. Yasseri contended that simple reverts or "undo" operations were not the most significant measure of counterproductive behavior at 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. The English's three largest conflict rates belonged to the articles George W. Bush, Anarchism, and Muhammad. By comparison, for the German, the three largest conflict rates at the time of the Oxford study were for the articles covering Croatia, Scientology, and 9/11 conspiracy theories.
Researchers from Washington University developed a statistical model to measure systematic bias in the behavior of'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.
has been criticized for allowing information of graphic content. Articles depicting what some critics have called objectionable content (such as Feces, Cadaver, Human penis, Vulva, and Nudity) contain graphic pictures and detailed information easily available to anyone with access to the internet, including children.
The site also includes sexual content such as images and videos of masturbation and ejaculation, illustrations of zoophilia, and photos from hardcore pornographic films in its articles. It also has non-sexual photographs of nude children.
The article about Virgin Killer—a 1976 album from the German rock band Scorpions—features a picture of the album's original cover, which depicts a naked prepubescent girl. The original release cover caused controversy and was replaced in some countries. In December 2008, access to the article Virgin Killer was blocked for four days by most Internet service providers in the United Kingdom after the Internet Watch Foundation (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 contained child pornography, and were in violation of US federal obscenity law. Sanger later clarified that the images, which were related to pedophilia and one about lolicon, 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. 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 in schools. Wikimedia Foundation spokesman Jay Walsh strongly rejected Sanger's accusation, saying that 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 volunteer 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, noticed that many of the pornographic images deleted from since 2010 have reappeared.
One privacy concern in the case of is the right of a private citizen to remain a "private citizen" rather than a "public figure" in the eyes of the law.[note 6] It is a battle between the right to be anonymous in cyberspace and the right to be anonymous in real life ("meatspace"). A particular problem occurs in the case of an individual who is relatively unimportant and for whom there exists a page against her or his wishes.
In January 2006, a German court ordered the German shut down within Germany because it stated the full name of Boris Floricic, 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 or that of his parents was being violated.
has a "Volunteer Response Team" that uses the OTRS system 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.
has been described as harboring a battleground culture of sexism and harassment. The perceived toxic attitudes and tolerance of violent and abusive language are also reasons put forth for the gender gap in editors. In 2014, a female editor who requested a separate space on to discuss improving civility had her proposal referred to by a male editor using the words "the easiest way to avoid being called a cunt is not to act like one".
is hosted and funded by the Wikimedia Foundation, a non-profit organization which also operates-related projects such as Wiktionary and Wikibooks. 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 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 an opportunity to develop in more concentrated directions guided by her often repeated position statement that, "Information, like air, wants to be free." 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, 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 due to issues concerning the use of the "superprotection" feature which some language versions of have adopted, Katherine Maher became the third executive director the Wikimedia Foundation in June 2016. Maher has stated that one of her priorities would be the issue of editor harassment endemic to as identified by the board in December. Maher stated regarding the harassment issue that: "It establishes a sense within the community that this is a priority ... (and that correction requires that) it has to be more than words."
is also supported by many organizations and groups that are affiliated with the Wikimedia Foundation but independently run, called Wikimedia movement affiliates. These include Wikimedia chapters (which are national or sub-national organizations, such as Wikimedia Deutschland and Wikimédia France), thematic organizations (such as Amical Wikimedia for the Catalan language community), and user groups. These affiliates participate in the promotion, development, and funding of.
The operation of depends on MediaWiki, a custom-made, free and open source wiki software platform written in PHP and built upon the MySQL database system. The software incorporates programming features such as a macro language, variables, a transclusion system for templates, and URL redirection. MediaWiki is licensed under the GNU General Public License and it is used by all Wikimedia projects, as well as many other wiki projects. Originally, ran on UseModWiki written in Perl by Clifford Adams (Phase I), which initially required CamelCase for article hyperlinks; the present double bracket style was incorporated later. Starting in January 2002 (Phase II), began running on a PHP wiki engine with a MySQL database; this software was custom-made for by Magnus Manske. The Phase II software was repeatedly modified to accommodate the exponentially increasing demand. In July 2002 (Phase III), shifted to the third-generation software, MediaWiki, originally written by Lee Daniel Crocker.
Several MediaWiki extensions are installed to extend the functionality of the MediaWiki software.
In April 2005, a Lucene extension was added to MediaWiki's built-in search and switched from MySQL to Lucene for searching. The site currently uses Lucene Search 2.1,[needs update] which is written in Java and based on Lucene library 2.3.
In July 2013, after extensive beta testing, a WYSIWYG (What You See Is What You Get) extension, VisualEditor, 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.
Computer programs called bots 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 was reported to create up to 10,000 articles on the Swedish 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 edits were made via IPs controlled by the Russian government. Bots on must be approved before activation.
receives between 25,000 and 60,000 page requests per second, depending on time of day.[needs update] As of 2019[update], page requests are first passed to a front-end layer of Varnish caching servers. Further statistics, based on a publicly available 3-month access trace, are available. Requests that cannot be served from the Varnish cache are sent to load-balancing servers running the Linux Virtual Server 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. 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.
currently runs on dedicated clusters of Linux servers (mainly Ubuntu). As of December 2009[update], there were 300 in Florida and 44 in Amsterdam. By January 22, 2013, had migrated its primary data center to an Equinix facility in Ashburn, Virginia. in 2017, had installed a caching cluster in an Equinix facility in Singapore, the first of its kind in Asia.
In accordance with 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 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 for the purpose of ameliorating 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. 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.
Community-produced news publications include the English's The Signpost, founded in 2005 by Michael Snow, an attorney, administrator and former chair of the Wikimedia Foundation board of trustees. It covers news and events from the site, as well as major events from other Wikimedia projects, such as Wikimedia Commons. Similar publications are the German-language Kurier, and the Portuguese-language Correio da Wikipédia. Other past and present community news publications on English include the Wikiworld webcomic, the Weekly podcast, and newsletters of specific WikiProjects like The Bugle from WikiProject Military History and the monthly newsletter from The Guild of Copy Editors. There are also a number of publications from the Wikimedia Foundation and multilingual publications such as the Wikimedia Blog and This Month in Education.
When the project was started in 2001, all text in was covered by the GNU Free Documentation License (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 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 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 to relicense its content to CC BY-SA by August 1, 2009. (A new version of the GFDL automatically covers contents.) In April 2009, 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, include non-free image files under fair use 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 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 repository, a project operated by the Wikimedia Foundation.'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.
Because content is distributed under an open license, anyone can reuse or re-distribute it at no charge. The content of has been published in many forms, both online and offline, outside the website.
Obtaining the full contents of for reuse presents challenges, since direct cloning via a web crawler is discouraged. publishes "dumps" of its contents, but these are text-only; as of 2007[update] there was no dump available of's images.
Several languages of 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 reference desk is comparable to a standard library reference desk, with an accuracy of 55 percent.
Wikipedia's original medium was for users to read and edit content using any standard web browser through a fixed Internet connection. Although 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 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 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 in May 2014, Wikimedia representatives made a technical announcement concerning the number of mobile access systems in the market seeking access to. 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 latest version of the Android app for 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 latest version for iOS was released on April 3, 2013, to similar reviews.
Access to from mobile phones was possible as early as 2004, through the Wireless Application Protocol (WAP), via the Wapedia service. In June 2007 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-based devices or WebOS-based devices. Several other methods of mobile access to have emerged. Many devices and applications optimize or enhance the display of content for mobile devices, while some also incorporate additional features such as use of metadata (See Wikipedia:Metadata), such as geoinformation.
Andrew Lih and Andrew Brown both maintain editing with smartphones is difficult and this discourages new potential contributors. The number of editors has been declining after several years and Tom Simonite of MIT Technology Review 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's long-term future while Brown fears problems with will remain and rival encyclopedias will not replace it.
In 2017–18, after a barrage of false news reports, both Facebook and YouTube announced they would rely on to help their users evaluate reports and reject false news. Noam Cohen, writing in The Washington Post states, "YouTube's reliance on to set the record straight builds on the thinking of another fact-challenged platform, the Facebook social network, which announced last year that would help its users root out 'fake news'." In answer to the question of 'how engaged are visitors to the site?' Alexa records the daily pageviews per visitor as 3.04 and the daily time on site as 4.01 minutes.
In February 2014, The New York Times reported that was ranked fifth globally among all websites, stating "With 18 billion page views and nearly 500 million unique visitors a month [...] 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 growth in the number of its articles, has steadily gained status as a general reference website since its inception in 2001. About 50 percent of search engine traffic to comes from Google, a good portion of which is related to academic research. The number of readers of worldwide reached 365 million at the end of 2009. The Pew Internet and American Life project found that one third of US Internet users consulted. In 2011 Business Insider gave a valuation of $4 billion if it ran advertisements.
According to "Readership Survey 2011", the average age of readers is 36, with a rough parity between genders. Almost half of readers visit the site more than five times a month, and a similar number of readers specifically look for in search engine results. About 47 percent of readers do not realize that is a non-profit organization.
Wikipedia's content has also been used in academic studies, books, conferences, and court cases. The Parliament of Canada's website refers to'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 has also been cited as a source and referenced in some 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 RNA family for publication in.
In July 2007, 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 in popular culture is such that the word is one of a select band of 21st-century nouns that are so familiar (Google, Facebook, YouTube) that they no longer need explanation.
On September 28, 2007, 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, "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 had become a focal point in the 2008 US election campaign, saying: "Type a candidate's name into Google, and among the first results is a 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 "page the latest status symbol", reported the recent phenomenon of how having a article vindicates one's notability.
Active participation also has an impact. Law students have been assigned to write articles as an exercise in clear and succinct writing for an uninitiated audience.
A working group led by Peter Stone (formed as a part of the Stanford-based project One Hundred Year Study on Artificial Intelligence) in its report called "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, Hossein Derakhshan describes as "one of the last remaining pillars of the open and 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,'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 typographic culture to a photographic one, which in turn mean[s] a shift from rationality to emotions, exposition to entertainment". Rather than "sapere aude" (lit. ''dare to know''), social networks have led to a culture of "[d]are not to care to know". This is while faces "a more concerning problem" than funding, namely "a flattening growth rate in the number of contributors to the website". Consequently, the challenge for and those who use it is to "save 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."
won two major awards in May 2004. 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. was also nominated for a "Best Practices" Webby award.
In 2007, readers of brandchannel.com voted 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, received 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, was awarded both the annual Erasmus Prize, which recognizes exceptional contributions to culture, society or social sciences, and the Spanish Princess of Asturias Award on International Cooperation. Speaking at the Asturian Parliament in Oviedo, the city that hosts the awards ceremony, Jimmy Wales praised the work of the Asturian language users. The night of the ceremony, members of the Wikimedia Foundation held a meeting withns from all parts of Spain, including the local Asturian community.
Many parodies target's openness and susceptibility to inserted inaccuracies, with characters vandalizing or modifying the online encyclopedia project's articles.
Comedian Stephen Colbert has parodied or referenced on numerous episodes of his show The Colbert Report 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 "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' Page Viewed 874 Times Today".
In an episode of the television comedy The Office U.S., which aired in April 2007, an incompetent office manager (Michael Scott) is shown relying on a hypothetical article for information on negotiation tactics in order 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 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, played on the perception that is an unreliable reference tool with a scene in which Dr. Perry Cox reacts to a patient who says that a 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 Battlestar Galactica episode guide.
In 2008, the comedic website CollegeHumor produced a video sketch named "Professor", in which the fictitious Professor instructs a class with a medley of unverifiable and occasionally absurd statements.
In 2010, comedian Daniel Tosh encouraged viewers of his show, Tosh.0, to visit the show's 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.
On August 23, 2013, the New Yorker website published a cartoon with this caption: "Dammit, Manning, have you considered the pronoun war that this is going to start on your 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 "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.
has also spawned several sister projects, which are also wikis run by the Wikimedia Foundation. These other Wikimedia projects include Wiktionary, a dictionary project launched in December 2002, Wikiquote, a collection of quotations created a week after Wikimedia launched, Wikibooks, a collection of collaboratively written free textbooks and annotated texts, Wikimedia Commons, 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, Wikispecies, is a catalogue of species. In 2012 Wikivoyage, an editable travel guide, and Wikidata, an editable knowledge base, launched.
The most obvious economic effect of has been the death of commercial encyclopedias, especially the printed versions, e.g. Encyclopædia Britannica, which were unable to compete with a product that is essentially free. Nicholas Carr wrote a 2005 essay, "The amorality of Web 2.0", that criticized websites with user-generated content, like, 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, or similar efforts, will entirely displace traditional publications. For instance, Chris Anderson, the editor-in-chief of Wired Magazine, wrote in Nature that the "wisdom of crowds" approach of will not displace top scientific journals, with their rigorous peer review process.
There is also an ongoing debate about the influence of on the biography publishing business. "The worry is that, if you can get all that information from, 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.
has been widely used as a 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.
In 2015, French researchers Dr 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 scholarly citations. They used PageRank "followed by the number of appearances in the 24 different language editions of (descending order) and the century in which they were founded (ascending order)".
A 2018 Charles University study concluded that is the most used OER for students of environmental studies (used by 95% of students) and argued that educational institutions should focus their attention on it (for example by supporting Wikipedians in residence).
Studies related to 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, may include different measures for articles and infoboxes.
A number of interactive multimedia encyclopedias incorporating entries written by the public existed long before 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 (e.g. Everything2), with many later being merged into the project (e.g. GNE). 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 websites have drawn inspiration from. Some, such as Susning.nu, Enciclopedia Libre, Hudong, and Baidu Baike likewise employ no formal review process, although some like Conservapedia are not as open. 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.
The sheer volume of content [...] is partly responsible for the site's dominance as an online reference. When compared to the top 3,200 educational reference sites in the US, is No. 1, capturing 24.3% of all visits to the category. Cf. Bill Tancer (Global Manager, Hitwise), "Wikipedia, Search and School Homework" Archived March 25, 2012, at the Wayback Machine, Hitwise, March 1, 2007.
Online encyclopedia has added about 20 million unique monthly visitors in the past year, making it the top online news and information destination, according to Nielsen//NetRatings.
'I can start an article that will consist of one paragraph, and then a real expert will come along and add three paragraphs and clean up my one paragraph,' said Larry Sanger of Las Vegas, who founded with Mr. Wales.
The's open structure makes it a target for trolls and vandals who malevolently add incorrect information to articles, get other people tied up in endless discussions, and generally do everything to draw attention to themselves.
There is a certain mindset associated with unmoderated Usenet groups [...] that infects the collectively-managed project: if you react strongly to trolling, that reflects poorly on you, not (necessarily) on the troll. If you [...] demand that something be done about constant disruption by trollish behavior, the other listmembers will cry "censorship", attack you, and even come to the defense of the troll. [...] The root problem: anti-elitism, or lack of respect for expertise. There is a deeper problem [...] which explains both of the above-elaborated problems. Namely, as a community, lacks the habit or tradition of respect for expertise. As a community, far from being elitist, it is anti-elitist (which, in this context, means that expertise is not accorded any special respect, and snubs and disrespect of expertise is tolerated). This is one of my failures: a policy that I attempted to institute in's first year, but for which I did not muster adequate support, was the policy of respecting and deferring politely to experts. (Those who were there will, I hope, remember that I tried very hard.)
Wikipedia's commitment to anonymity/pseudonymity thus imposes a sort of epistemic agnosticism on its readers
[The author, Danah Boyd, describes herself as] an expert on social media[,] [...] a doctoral student in the School of Information at the University of California, Berkeley [,] and a fellow at the Harvard University Berkman Center for Internet & Society [at Harvard Law School.]
narratives about national histories (i) are skewed towards more recent events (recency bias) and (ii) are distributed unevenly across the continents with significant focus on the history of European countries (Eurocentric bias).
has emerged as a site that continues to increase in popularity, both globally and in the US
36% of online American adults consult. It is particularly popular with the well-educated and current college-age students.
Socialist Labour Party of America [...] though it can trace its history as far back as 1876, when it was known as the Workingmen's Party, no less an authority than pronounces it "moribund".
Bertelsmann did not resort to euphemism this week when it announced the end of the Brockhaus encyclopedia brand. Brockhaus had been publishing reference books for two centuries when the media group bought it in 2008. [...] The internet has finished off Brockhaus altogether. [...] What Germans like is.
Larry Sanger describes the Citizendium project as a "progressive or gradual fork", with the major difference that experts have the final say over edits.
Jimmy Wales changed the world with, the hugely popular online encyclopedia that anyone can edit. What will he do next?
Jimmy Wales, founder of, discusses the site, how it's treated by governments, and how it's fueled by its users.