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Twitter
Twitter
(/ˈtwɪtər/) is an online news and social networking service on which users post and interact with messages known as "tweets". Tweets were originally restricted to 140 characters, but on November 7, 2017, this limit was doubled for all languages except Japanese, Korean, and Chinese.[11] Registered users can post tweets, but those who are unregistered can only read them. Users access Twitter
Twitter
through its website interface, through Short Message Service
Short Message Service
(SMS) or mobile-device application software ("app").[12] Twitter, Inc. is based in San Francisco, California, and has more than 25 offices around the world.[13] Twitter
Twitter
was created in March 2006 by Jack Dorsey, Noah Glass, Biz Stone, and Evan Williams and launched in July of that year. The service rapidly gained worldwide popularity. In 2012, more than 100 million users posted 340 million tweets a day,[14] and the service handled an average of 1.6 billion search queries per day.[15][16][17] In 2013, it was one of the ten most-visited websites and has been described as "the SMS
SMS
of the Internet".[18][19] As of 2016, Twitter had more than 319 million monthly active users.[9] On the day of the 2016 U.S. presidential election, Twitter
Twitter
proved to be the largest source of breaking news, with 40 million election-related tweets sent by 10 p.m. (Eastern Time) that day.[20]

Contents

1 History

1.1 Creation and initial reaction 1.2 Growth

1.2.1 2011–2014 1.2.2 2015 and slow growth 1.2.3 Initial public offering
Initial public offering
(IPO)

2 Leadership 3 Logo 4 Features

4.1 Tweets

4.1.1 Content 4.1.2 Format 4.1.3 Trending topics

4.2 Adding and following content 4.3 Verified accounts 4.4 Mobile 4.5 Third-party applications 4.6 Related headlines feature 4.7 Polls 4.8 Streaming video

5 Usage

5.1 Demographics

6 Finances

6.1 Funding 6.2 Revenue
Revenue
sources

7 Technology

7.1 Implementation 7.2 Interface 7.3 Outages 7.4 Privacy, security, and harassment 7.5 Open source 7.6 Innovators patent agreement 7.7 URL shortener 7.8 Integrated photo-sharing service 7.9 Twitterbots

8 Developers 9 Society

9.1 Issues and controversies 9.2 Censorship

9.2.1 Trending topics 9.2.2 Trust & Safety Council

9.3 Impact

9.3.1 Instant, short, and frequent communication 9.3.2 Emergency use 9.3.3 Education 9.3.4 Public figures 9.3.5 World leaders 9.3.6 Religion 9.3.7 Twitterbot effect

9.4 GCHQ

10 Television 11 Statistics

11.1 User accounts with large follower base 11.2 Oldest accounts 11.3 Record tweets

12 See also 13 References 14 Further reading 15 External links

History Further information: Timeline of Twitter Creation and initial reaction

A sketch, c. 2006, by Jack Dorsey, envisioning an SMS-based social network.

Twitter's origins lie in a "daylong brainstorming session" held by board members of the podcasting company Odeo. Jack Dorsey, then an undergraduate student at New York University, introduced the idea of an individual using an SMS
SMS
service to communicate with a small group.[21][22] The original project code name for the service was twttr, an idea that Williams later ascribed to Noah Glass,[23] inspired by Flickr
Flickr
and the five-character length of American SMS
SMS
short codes. The decision was also partly due to the fact that the domain twitter.com was already in use, and it was six months after the launch of twttr that the crew purchased the domain and changed the name of the service to Twitter.[24] The developers initially considered "10958" as a short code, but later changed it to "40404" for "ease of use and memorability".[25] Work on the project started on March 21, 2006, when Dorsey published the first Twitter
Twitter
message at 9:50 p.m. Pacific Standard Time (PST): "just setting up my twttr".[1] Dorsey has explained the origin of the "Twitter" title:

...we came across the word 'twitter', and it was just perfect. The definition was 'a short burst of inconsequential information,' and 'chirps from birds'. And that's exactly what the product was.[26]

The first Twitter
Twitter
prototype, developed by Dorsey and contractor Florian Weber, was used as an internal service for Odeo employees[27] and the full version was introduced publicly on July 15, 2006.[10] In October 2006, Biz Stone, Evan Williams, Dorsey, and other members of Odeo formed Obvious Corporation and acquired Odeo, together with its assets — including Odeo.com and Twitter.com — from the investors and shareholders.[28] Williams fired Glass, who was silent about his part in Twitter's startup until 2011.[29] Twitter
Twitter
spun off into its own company in April 2007.[30] Williams provided insight into the ambiguity that defined this early period in a 2013 interview:

With Twitter, it wasn't clear what it was. They called it a social network, they called it microblogging, but it was hard to define, because it didn't replace anything. There was this path of discovery with something like that, where over time you figure out what it is. Twitter
Twitter
actually changed from what we thought it was in the beginning, which we described as status updates and a social utility. It is that, in part, but the insight we eventually came to was Twitter
Twitter
was really more of an information network than it is a social network.[31]

The tipping point for Twitter's popularity was the 2007 South by Southwest Interactive (SXSWi) conference. During the event, Twitter usage increased from 20,000 tweets per day to 60,000.[32][33] "The Twitter
Twitter
people cleverly placed two 60-inch plasma screens in the conference hallways, exclusively streaming Twitter
Twitter
messages," remarked Newsweek's Steven Levy. "Hundreds of conference-goers kept tabs on each other via constant twitters. Panelists and speakers mentioned the service, and the bloggers in attendance touted it."[34] Reaction at the conference was highly positive. Blogger Scott Beale said that Twitter
Twitter
was "absolutely ruling" SXSWi. Social software researcher danah boyd said Twitter
Twitter
was "owning" the conference.[35] Twitter
Twitter
staff received the festival's Web Award prize with the remark "we'd like to thank you in 140 characters or less. And we just did!"[36] The first unassisted off-Earth Twitter
Twitter
message was posted from the International Space Station
International Space Station
by NASA
NASA
astronaut T. J. Creamer on January 22, 2010.[37] By late November 2010, an average of a dozen updates per day were posted on the astronauts' communal account, @NASA_Astronauts. NASA
NASA
has also hosted over 25 "tweetups", events that provide guests with VIP access to NASA
NASA
facilities and speakers with the goal of leveraging participants' social networks to further the outreach goals of NASA. In August 2010, the company appointed Adam Bain from News
News
Corp.'s Fox Audience Network as president of revenue.[38] Growth The company experienced rapid initial growth. It had 400,000 tweets posted per quarter in 2007. This grew to 100 million tweets posted per quarter in 2008. In February 2010, Twitter
Twitter
users were sending 50 million tweets per day.[39] By March 2010, the company recorded over 70,000 registered applications.[40] As of June 2010, about 65 million tweets were posted each day, equaling about 750 tweets sent each second, according to Twitter.[41] As of March 2011, that was about 140 million tweets posted daily.[42] As noted on Compete.com, Twitter moved up to the third-highest-ranking social networking site in January 2009 from its previous rank of twenty-second.[43]

Jack Dorsey, co-founder and CEO of Twitter, in 2009

Twitter's usage spikes during prominent events. For example, a record was set during the 2010 FIFA World Cup
2010 FIFA World Cup
when fans wrote 2,940 tweets per second in the thirty-second period after Japan scored against Cameroon on June 14. The record was broken again when 3,085 tweets per second were posted after the Los Angeles Lakers' victory in the 2010 NBA Finals on June 17,[44] and then again at the close of Japan's victory over Denmark in the World Cup when users published 3,283 tweets per second.[45] The record was set again during the 2011 FIFA Women's World Cup Final between Japan and the United States, when 7,196 tweets per second were published.[46] When American singer Michael Jackson
Michael Jackson
died on June 25, 2009, Twitter
Twitter
servers crashed after users were updating their status to include the words "Michael Jackson" at a rate of 100,000 tweets per hour.[47] The current record as of August 3, 2013 was set in Japan, with 143,199 tweets per second during a television screening of the movie Castle in the Sky[48] (beating the previous record of 33,388, also set by Japan for the television screening of the same movie).[49] Twitter
Twitter
acquired application developer Atebits on April 11, 2010. Atebits had developed the Apple Design Award-winning Twitter
Twitter
client Tweetie for the Mac and iPhone. The application, now called "Twitter" and distributed free of charge, is the official Twitter
Twitter
client for the iPhone, iPad and Mac.[50] From September through October 2010, the company began rolling out "New Twitter", an entirely revamped edition of twitter.com. Changes included the ability to see pictures and videos without leaving Twitter
Twitter
itself by clicking on individual tweets which contain links to images and clips from a variety of supported websites including YouTube
YouTube
and Flickr, and a complete overhaul of the interface, which shifted links such as '@mentions' and 'Retweets' above the Twitter stream, while 'Messages' and 'Log Out' became accessible via a black bar at the very top of twitter.com. As of November 1, 2010, the company confirmed that the "New Twitter
Twitter
experience" had been rolled out to all users. 2011–2014 On April 5, 2011, Twitter
Twitter
tested a new homepage and phased out the "Old Twitter".[51] However, a glitch came about after the page was launched, so the previous "retro" homepage was still in use until the issues were resolved; the new homepage was reintroduced on April 20.[52][53] On December 8, 2011, Twitter
Twitter
overhauled its website once more to feature the "Fly" design, which the service says is easier for new users to follow and promotes advertising. In addition to the Home tab, the Connect and Discover tabs were introduced along with a redesigned profile and timeline of Tweets. The site's layout has been compared to that of Facebook.[54][55] On February 21, 2012, it was announced that Twitter
Twitter
and Yandex
Yandex
agreed to a partnership. Yandex, a Russian search engine, finds value within the partnership due to Twitter's real time news feeds. Twitter's director of business development explained that it is important to have Twitter
Twitter
content where Twitter
Twitter
users go.[56] On March 21, 2012, Twitter
Twitter
celebrated its sixth birthday while also announcing that it had 140 million users and 340 million tweets per day. The number of users was up 40% from their September 2011 number, which was said to have been at 100 million at the time.[57] In April 2012, Twitter
Twitter
announced that it was opening an office in Detroit, with the aim of working with automotive brands and advertising agencies.[58] Twitter
Twitter
also expanded its office in Dublin.[59] On June 5, 2012, a modified logo was unveiled through the company blog, removing the text to showcase the slightly redesigned bird as the sole symbol of Twitter.[60][61] On October 5, 2012, Twitter
Twitter
acquired a video clip company called Vine that launched in January 2013.[62][63] Twitter
Twitter
released Vine as a standalone app that allows users to create and share six-second looping video clips on January 24, 2013. Vine videos shared on Twitter
Twitter
are visible directly in users' Twitter
Twitter
feeds.[64] Due to an influx of inappropriate content, it is now rated 17+ in Apple's app store.[65] On December 18, 2012, Twitter
Twitter
announced it had surpassed 200 million monthly active users. Twitter
Twitter
hit 100 million monthly active users in September 2011.[66] On January 28, 2013, Twitter
Twitter
acquired Crashlytics in order to build out its mobile developer products.[67] On April 18, 2013, Twitter
Twitter
launched a music app called Twitter
Twitter
Music for the iPhone.[68] On August 28, 2013, Twitter
Twitter
acquired Trendrr,[69] followed by the acquisition of MoPub on September 9, 2013.[70] As of September 2013, the company's data showed that 200 million users send over 400 million tweets daily, with nearly 60% of tweets sent from mobile devices.[71] On June 4, 2014, Twitter
Twitter
announced that it will acquire Namo Media, a technology firm specializing in "native advertising" for mobile devices.[72] On June 19, 2014, Twitter announced that it has reached an undisclosed deal to buy SnappyTV, a service that helps edit and share video from television broadcasts.[73][74] The company was helping broadcasters and rights holders to share video content both organically across social and via Twitter's Amplify program.[75] In July 2014, Twitter
Twitter
announced that it intends to buy a young company called CardSpring for an undisclosed sum. CardSpring enables retailers to offer online shoppers coupons that they can automatically sync to their credit cards in order to receive discounts when they shop in physical stores.[76] On July 31, 2014, Twitter
Twitter
announced that it has acquired a small password-security startup called Mitro.[77] On October 29, 2014, Twitter
Twitter
announced a new partnership with IBM. The partnership is intended to help businesses use Twitter
Twitter
data to understand their customers, businesses and other trends.[78] 2015 and slow growth On February 11, 2015, Twitter
Twitter
announced that it had acquired Niche, an advertising network for social media stars, founded by Rob Fishman and Darren Lachtman.[79] The acquisition price was reportedly $50 million.[80] On March 13, 2015, Twitter
Twitter
announced its acquisition of Periscope, an app that allows live streaming of video.[81] In April 2015, the Twitter.com desktop homepage changed.[82] Twitter
Twitter
announced that it has acquired TellApart, a commerce ads tech firm, with $532 million stock.[83][84] Later in the year it became apparent that growth had slowed, according to Fortune,[85] Business Insider,[86] Marketing Land[87] and other news websites including Quartz (in 2016).[88] In June 2016, Twitter
Twitter
acquired an artificial intelligence startup called Magic Pony for $150 million.[89][90] Initial public offering
Initial public offering
(IPO)

Twitter's San Francisco, California, headquarters, as seen from a corner on Market Street

On September 12, 2013, Twitter
Twitter
announced that it had filed papers with the U.S. Securities and Exchange Commission
U.S. Securities and Exchange Commission
(SEC) ahead of a planned stock market listing.[91] It revealed its prospectus in an 800-page filing.[92] Twitter
Twitter
planned to raise US$1 billion as the basis for its stock market debut.[93] The IPO filing states that "200,000,000+ monthly active users" access Twitter
Twitter
and "500,000,000+ tweets per day" are posted.[31][94] In an October 15, 2013 amendment to their SEC S-1 filing,[95] Twitter
Twitter
declared that they would list on the New York Stock Exchange (NYSE), quashing speculation that their stock would trade on the NASDAQ
NASDAQ
exchange. This decision was widely viewed to be a reaction to the botched initial public offering of Facebook.[96] On November 6, 2013, 70 million shares[97] were priced at US$26 and issued by lead underwriter Goldman Sachs.[98] On November 7, 2013, the first day of trading on the NYSE, Twitter shares opened at $26.00 and closed at US$44.90, giving the company a valuation of around US$31 billion.[99] The paperwork from November 7 shows that among the founders, Williams received a sum of US$2.56 billion and Dorsey received US$1.05 billion, while Costolo's payment was US$345 million.[100] On February 5, 2014, Twitter
Twitter
published its first results as a public company, showing a net loss of $511 million in the fourth quarter of 2013.[101] On January 5, 2016, CEO Jack Dorsey commented on a report that Twitter
Twitter
planned to expand its character limit to 10,000 (private messages already had the longer limit as of July), requiring users to click to see anything beyond 140 characters. He said while Twitter
Twitter
would "never lose that feeling" of speed, users could do more with the text.[102] In September 2016, Twitter
Twitter
shares rose 20% after a report that it had received takeover approaches.[103] Potential buyers were Alphabet (parent company of Google),[103] Microsoft,[104][105][106] Salesforce.com,[103][107] Verizon,[107] and The Walt Disney Company.[108][109] Twitter's board of directors were open to a deal, which could have come by the end of 2016.[103][110] However, no deal was made, with reports in October stating that all the potential buyers dropped out partly due to concerns over abuse and harassment on the service.[111][112][113] In June of 2017, Twitter
Twitter
revamped its dashboard to improve the new user experience.[114][115] Leadership As chief executive officer, Dorsey saw the startup through two rounds of capital funding by the venture capitalists who backed the company.[116] On October 16, 2008,[117] Williams took over the role of CEO, and Dorsey became chairman of the board.[118] On October 4, 2010, Williams announced that he was stepping down as CEO. Dick Costolo, formerly Twitter's chief operating officer, became CEO. On October 4, 2010, Williams made an announcement saying that he will stay with the company and "be completely focused on product strategy".[119][120] According to The New York Times, "Mr. Dorsey and Mr. Costolo forged a close relationship" when Williams was away.[121] According to PC Magazine, Williams was "no longer involved in the day-to-day goings on at the company". He was focused on developing a new startup, and became a member of Twitter's board of directors, and promised to "help in any way I can". In 2011, Stone was still with Twitter
Twitter
but was working with AOL
AOL
as an "advisor on volunteer efforts and philanthropy".[122] In January 2014 Stone announced the release of Jelly, a 'social Q&A network for mobile'.[123] Dorsey rejoined Twitter
Twitter
in March 2011, as executive chairman focusing on product development. At that time he split his schedule with Square (where he is CEO), whose offices are within walking distance of Twitter's in San Francisco.[121] In September 2011, board members and investors Fred Wilson and Bijan Sabet resigned from Twitter's Board of Directors.[124] In October 2012, Twitter
Twitter
announced it had hired former Google
Google
executive Matt Derella to become their new director of business agency development.[125] Twitter
Twitter
named former Goldman Sachs
Goldman Sachs
executive Anthony Noto as the company's CFO in July 2014, with an "annual salary of $250,000 and one-time restricted stock options of 1.5 million shares ... valued at $61.5 million".[126] On June 10, 2015, Twitter
Twitter
announced its CEO Dick Costolo would resign on July 1, 2015.[127] Noto was said to be considered a potential replacement for outgoing CEO Costolo.[128] On October 14, 2015, former Google
Google
chief business officer Omid Kordestani
Omid Kordestani
became executive chairman, replacing Dorsey who remains CEO.[129] On January 26, 2016, Leslie Berland, former executive vice president of global advertising, marketing, and digital partnerships at American Express, was named chief marketing officer.[130] In November 2016, COO Adam Bain announced his resignation and CFO Anthony Noto took over Bain's role.[131][132] A month later, on December 20, 2016, CTO Adam Messinger announced that he too was leaving.[133][134] Logo

July 15, 2006 – September 14, 2010

September 14, 2010 – June 5, 2012

Twitter
Twitter
has become internationally identifiable by its signature bird logo, or the Twitter
Twitter
Bird. The original logo, which was simply the word "Twitter", was in use from its launch in March 2006 until September 2010. It was accompanied by an image of a bird which was a piece of clip art created by the British graphic designer Simon Oxley.[135] A slightly modified version with "Larry the Bird" next to the old logo succeeded the first style when the website underwent its first redesign. A tweet from an employee that works on the company's platform and API discussed the evolution of the "Larry the Bird" logo with Twitter's creative director and it was revealed that it was named after Larry Bird
Larry Bird
of the NBA's Boston Celtics
Boston Celtics
fame. This detail had been confirmed when the Boston Celtics' director of interactive media asked Twitter
Twitter
co-founder Biz Stone
Biz Stone
about it in August 2011.[136]

June 5, 2012 – present

In 2012, Twitter
Twitter
unveiled its third logo redesign, replacing Larry the Bird with an updated icon simply named as the " Twitter
Twitter
Bird," as seen to the right. As of this logo revision, the word "Twitter" and the lowercase letter "t" are no longer used, with the bird becoming the sole symbol for the company's branding.[137] According to Douglas Bowman, designer of Twitter, the new logo resembles a mountain bluebird.[138][139] Features Tweets

The Twitter
Twitter
account page for, demonstrating the account-customized timeline view which shows tweets in reverse chronological order

Tweets are publicly visible by default, but senders can restrict message delivery to just their followers. Users can tweet via the Twitter
Twitter
website, compatible external applications (such as for smartphones), or by Short Message Service
Short Message Service
(SMS) available in certain countries.[140] Users may subscribe to other users' tweets—this is known as "following" and subscribers are known as "followers"[141] or "tweeps", a portmanteau of Twitter
Twitter
and peeps.[142] Individual tweets can be forwarded by other users to their own feed, a process known as a "retweet". Users can also "like" (formerly "favorite") individual tweets.[143] Twitter
Twitter
allows users to update their profile via their mobile phone either by text messaging or by apps released for certain smartphones and tablets.[144] Twitter
Twitter
has been compared to a web-based Internet
Internet
Relay Chat (IRC) client.[145] In a 2009 Time essay, technology author Steven Johnson described the basic mechanics of Twitter
Twitter
as "remarkably simple":[146]

As a social network, Twitter
Twitter
revolves around the principle of followers. When you choose to follow another Twitter
Twitter
user, that user's tweets appear in reverse chronological order on your main Twitter page. If you follow 20 people, you'll see a mix of tweets scrolling down the page: breakfast-cereal updates, interesting new links, music recommendations, even musings on the future of education.

According to research published in April 2014, around 44 percent of user accounts have never tweeted.[147] The first tweet was posted by Jack Dorsey
Jack Dorsey
(creator) at 12:50 PM PST on March 21, 2006 and read "just setting up my twittr".[148] In 2009, the first tweet was sent from space. US astronauts Nicola Stott and Jeff Williams took part in a live 'tweetup' from the International Space Station with around 35 members of the public at NASA
NASA
Headquarters, Washington, DC, USA.[149] Content

Content of tweets according to Pear Analytics    News
News
(3.6%)   Spam (3.8%)   Self-promotion (5.9%)   Pointless babble (40.1%)   Conversational (37.6%)   Pass-along value (8.7%)

San Antonio-based market-research firm Pear Analytics analyzed 2,000 tweets (originating from the United States
United States
and in English) over a two-week period in August 2009 from 11:00 am to 5:00 pm (CST) and separated them into six categories.[150] Pointless babble made up 40%, with 38% being conversational. Pass-along value had 9%, self-promotion 6% with spam and news each making 4%. Despite Jack Dorsey's own open contention that a message on Twitter
Twitter
is "a short burst of inconsequential information", social networking researcher Danah Boyd responded to the Pear Analytics survey by arguing that what the Pear researchers labelled "pointless babble" is better characterized as "social grooming" and/or "peripheral awareness" (which she justifies as persons "want[ing] to know what the people around them are thinking and doing and feeling, even when co-presence isn't viable").[151] Similarly, a survey of Twitter
Twitter
users found that a more specific social role of passing along messages that include a hyperlink is an expectation of reciprocal linking by followers.[152] Format "Retweet" and " Twitter
Twitter
hashtag" redirect here. For more about hashtags, see Hashtag. Further information: Mention (blogging) § @ (At sign) Users can group posts together by topic or type by use of hashtags – words or phrases prefixed with a "#" sign. Similarly, the "@" sign followed by a username is used for mentioning or replying to other users.[153] To repost a message from another Twitter
Twitter
user and share it with one's own followers, a user can click the retweet button within the Tweet. In late 2009, the " Twitter
Twitter
Lists" feature was added, making it possible for users to follow ad hoc lists of authors instead of individual authors.[141][154] Through SMS, users can communicate with Twitter
Twitter
through five gateway numbers: short codes for the United States, Canada, India, New Zealand, and an Isle of Man-based number for international use. There is also a short code in the United Kingdom which is only accessible to those on the Vodafone, O2[155] and Orange[156] networks. In India, since Twitter
Twitter
only supports tweets from Bharti Airtel,[157] an alternative platform called smsTweet[158] was set up by a user to work on all networks.[159] A similar platform called GladlyCast exists for mobile phone users in Singapore and Malaysia.[160] The tweets were set to a largely constrictive 140-character limit for compatibility with SMS
SMS
messaging, introducing the shorthand notation and slang commonly used in SMS
SMS
messages. The 140-character limit also increased the usage of URL shortening services such as bit.ly, goo.gl, tinyurl.com, tr.im, and other content-hosting services such as TwitPic, memozu.com and NotePub to accommodate multimedia content and text longer than 140 characters. Since June 2011, Twitter
Twitter
has used its own t.co domain for automatic shortening of all URLs posted on its site, making other link shorteners unnecessary for staying within Twitter's 140 character limit.[161][162] In 2016, Twitter
Twitter
announced that media such as photos, videos, and the person's handle, would not count against the already constrictive 140 character limit. A user photo post used to count for a large chunk of a Tweet, about 24 characters.[163] Attachments and links would also no longer be part of the character limit.[164] In 2017, Twitter
Twitter
increased to 280-character limit tweets.[165] Under the new limit, glyphs are counted as a variable number of characters, depending upon the script they are from: most European letters and punctuation forms count as one character, while each CJK glyph counts as two, so that only 140 such glyphs can be used in a tweet.[165] Trending topics

Countries and cities with local trending topics in Twitter

A word, phrase, or topic that is mentioned at a greater rate than others is said to be a "trending topic". Trending topics become popular either through a concerted effort by users or because of an event that prompts people to talk about a specific topic.[166] These topics help Twitter
Twitter
and their users to understand what is happening in the world and what people's opinions are about it.[167] Trending topics are sometimes the result of concerted efforts and manipulations by preteen and teenaged fans of certain celebrities or cultural phenomena, particularly musicians like Lady Gaga
Lady Gaga
(known as Little Monsters), Justin Bieber
Justin Bieber
(Beliebers), Rihanna
Rihanna
(Rih Navy) and One Direction
One Direction
(Directioners), and novel series Twilight (Twihards) and Harry Potter
Harry Potter
(Potterheads). Twitter
Twitter
has altered the trend algorithm in the past to prevent manipulation of this type with limited success.[168] The Twitter
Twitter
web interface displays a list of trending topics on a sidebar on the home page, along with sponsored content (see image). Twitter
Twitter
often censors trending hashtags that are claimed to be abusive or offensive. Twitter
Twitter
censored the #Thatsafrican[169] and #thingsdarkiessay hashtags after users complained that they found the hashtags offensive.[170] There are allegations that Twitter
Twitter
removed #NaMOinHyd from the trending list and added an Indian National Congress-sponsored hashtag.[171] Adding and following content There are numerous tools for adding content, monitoring content and conversations including Twitter's own TweetDeck, Salesforce.com, HootSuite, and Twitterfeed.com. As of 2009[update], fewer than half of tweets posted were posted using the web user interface with most users using third-party applications (based on an analysis of 500 million tweets by Sysomos).[172] Verified accounts

The official Twitter
Twitter
profile of Twitter, Inc. The blue check mark right of the profile name indicates that it is a verified account.

In June 2009, after being criticized by Kanye West
Kanye West
and sued by Tony La Russa over unauthorized accounts run by impersonators, Twitter launched their 'Verified Accounts' program.[173][174] Twitter
Twitter
stated that an account with a verification badge indicates "we've been in contact with the person or entity the account is representing and verified that it is approved."[175] After the beta period, Twitter stated in their FAQ that the company "proactively verifies accounts on an ongoing basis to make it easier for users to find who they’re looking for" and that they "do not accept requests for verification from the general public."[176] In July 2016, Twitter
Twitter
announced a public application process to grant verified status to an account "if it is determined to be of public interest" and that verification "does not imply an endorsement."[177][178][179] As of November 2017, Twitter
Twitter
continued to deny verification of Julian Assange
Julian Assange
despite his requests.[180] In November 2017, the company suspended the verification process and announced plans to refine it in response to backlash after white nationalist Jason Kessler
Jason Kessler
had his account verified on Twitter.[181][182][183] Verified status allows access to some features unavailable to other users, such as only seeing mentions from other verified accounts.[184] In a March 8, 2018 live-stream on Twitter's Periscope, Dorsey discussed the idea of allowing any user to get a verified account. “The intention is to open verification to everyone, and to do it in a way that is scalable where [ Twitter
Twitter
is] not in the way,” Dorsey said. “And people can verify more facts about themselves, and we don’t have to be the judge or imply any bias on our part.”[185] Mobile

The mobile version of Twitter[186]

Twitter
Twitter
has mobile apps for iPhone, iPad, Android, Windows 10, Windows Phone, BlackBerry, and Nokia S40.[187] Users can also tweet by sending SMS.[188] In April 2017, Twitter
Twitter
introduced Twitter
Twitter
Lite, a progressive web app designed for regions with unreliable and slow Internet
Internet
connections, with a size of less than one megabyte, designed for devices with limited storage capacity.[189][190] This has been released in countries with slow internet connection such as the Philippines.[191] Third-party applications For many years, Twitter
Twitter
has limited the use of third party applications accessing the service by implementing a 100,000 user limit per application.[192] Since August 2010, third-party Twitter applications have been required to use OAuth, an authentication method that does not require users to enter their password into the authenticating application. This was done to increase security and improve the user experience.[193] Related headlines feature This feature adds websites to the bottom of a tweet's permalink page. If a website embedded a tweet onto one of their stories, the tweet will show the websites that mentioned the tweet. This feature was added onto Twitter
Twitter
so if the viewer doesn't understand what the tweet means, they can click on the sites to read more about what the person is talking about.[194] Polls In 2015, Twitter
Twitter
began to roll out the ability to attach poll questions to tweets. Polls are open for up to 7 days, and voters are not personally identified.[195] Streaming video In 2016, Twitter
Twitter
began to place a larger focus on live streaming video programming, hosting various events including streams of the Republican and Democratic conventions during the U.S. presidential campaign as part of a partnership with CBS News,[196] Dreamhack
Dreamhack
and ESL eSports events,[197] and winning a bid for non-exclusive streaming rights to ten NFL
NFL
Thursday Night Football games in the 2016 season.[198][197] During an event in New York in May 2017, Twitter
Twitter
announced that it planned to construct a 24-hour streaming video channel hosted within the service, featuring content from various partners.[199][197] CEO Jack Dorsey
Jack Dorsey
stated that the digital video strategy was part of a goal for Twitter
Twitter
to be "the first place that anyone hears of anything going on that matters to them"; as of the first quarter of 2017, Twitter
Twitter
had over 200 content partners, who streamed over 800 hours of video over 450 events.[200] Twitter
Twitter
announced a number of new and expanded partnerships for its streaming video services at the event, including Bloomberg, BuzzFeed, Cheddar (Opening Bell and Closing Bell shows; the latter was introduced in October 2016) IMG Fashion (coverage of fashion events), Live Nation Entertainment
Live Nation Entertainment
(streaming concert events), Major League Baseball (weekly online game stream, plus a weekly program with live look-ins and coverage of trending stories), MTV
MTV
and BET (red carpet coverage for their MTV
MTV
Video Music Awards, MTV
MTV
Movie & TV Awards, and BET Awards), NFL
NFL
Network (the Monday-Thursday news program NFL Blitz Live, and Sunday Fantasy Gameday),[201][202] the PGA Tour
PGA Tour
(PGA Tour Live coverage of early tournament rounds preceding television coverage),[203] The Players' Tribune, Ben Silverman
Ben Silverman
and Howard T. Owens' Propagate (daily entertainment show #WhatsHappening), The Verge (weekly technology show Circuit Breaker: The Verge’s Gadget Show), Stadium (a new digital sports network being formed by Silver Chalice and Sinclair Broadcast Group)[204][205][206] and the WNBA
WNBA
(weekly game).[200] Usage In March 2018 Twitter
Twitter
is ranked the twelfth most visited website by Alexa's web traffic analysis.[207] Daily user estimates vary as the company does not publish statistics on active accounts. A February 2009 Compete.com blog entry ranked Twitter
Twitter
as the third most used social network based on their count of 6 million unique monthly visitors and 55 million monthly visits.[43] In 2009, Twitter
Twitter
had a monthly user retention rate of forty percent.[208] Twitter
Twitter
had annual growth of 1,382 percent, increasing from 475,000 unique visitors in February 2008 to 7 million in February 2009. Twitter's annual growth rate decreased from 7.8 percent in 2015 to 3.4 percent in 2017.[209] An April 2017 a statista.com blog entry ranked Twitter as the tenth most used social network based on their count of 319 million monthly visitors.[210] Its global user base in 2017 was 328 million.[211] Demographics See also: Black Twitter

Twitter.com Top5 Global Markets by Reach (%)[212][213]

Country

Percent

Indonesia Jun 2010

  

20.8%

Dec 2010

  

19.0%

Brazil Jun 2010

  

20.5%

Dec 2010

  

21.8%

Venezuela Jun 2010

  

19.0%

Dec 2010

  

21.1%

Netherlands Jun 2010

  

17.7%

Dec 2010

  

22.3%

Japan Jun 2010

  

16.8%

Dec 2010

  

20.0%

Note: Visitor age 15+, home and work locations. Excludes visitation from public computers such as Internet
Internet
cafes or access from mobile phones or PDAs.

In 2009, Twitter
Twitter
was mainly used by older adults who might not have used other social sites before Twitter, said Jeremiah Owyang, an industry analyst studying social media. "Adults are just catching up to what teens have been doing for years," he said.[214] According to comScore only eleven percent of Twitter's users are aged twelve to seventeen.[214] comScore attributed this to Twitter's "early adopter period" when the social network first gained popularity in business settings and news outlets attracting primarily older users. However, comScore also stated in 2009 that Twitter
Twitter
had begun to "filter more into the mainstream", and "along with it came a culture of celebrity as Shaq, Britney Spears
Britney Spears
and Ashton Kutcher
Ashton Kutcher
joined the ranks of the Twitterati".[215] According to a study by Sysomos in June 2009, women make up a slightly larger Twitter
Twitter
demographic than men—fifty-three percent over forty-seven percent. It also stated that five percent of users accounted for seventy-five percent of all activity, and that New York City has more Twitter
Twitter
users than other cities.[216] According to Quancast, twenty-seven million people in the US used Twitter
Twitter
as of September 3, 2009. Sixty-three percent of Twitter
Twitter
users are under thirty-five years old; sixty percent of Twitter
Twitter
users are Caucasian, but a higher than average (compared to other Internet properties) are African American/black (sixteen percent) and Hispanic (eleven percent); fifty-eight percent of Twitter
Twitter
users have a total household income of at least US$60,000.[217] The prevalence of African American Twitter usage
Twitter usage
and in many popular hashtags has been the subject of research studies.[218][219] On September 7, 2011, Twitter
Twitter
announced that it had 100 million active users logging in at least once a month and 50 million active users every day.[220] In an article published on January 6, 2012, Twitter
Twitter
was confirmed to be the biggest social media network in Japan, with Facebook
Facebook
following closely in second. comScore confirmed this, stating that Japan was the only country in the world where Twitter
Twitter
leads Facebook.[221] On March 31, 2014, Twitter
Twitter
announced there were 255 million monthly active users (MAUs) and 198 million mobile MAUs.[222] In 2013, there were over 100 million users actively using Twitter
Twitter
daily and about 500 million Tweets every day,[223] with about 29% of users checking Twitter
Twitter
multiple times a day.[224] In 2012, the country with the most active users on Twitter
Twitter
was the United States.[225] A 2016 Pew research poll found that Twitter
Twitter
is used by 24% of all online US adults. It was equally popular with men and women (24% and 25% of online Americans respectively), but more popular with younger (36% of 18-29 year olds) generations.[226] Finances Funding

Twitter's San Francisco
San Francisco
headquarters located at 1355 Market St.

Twitter
Twitter
raised over US$57 million from venture capitalist growth funding, although exact figures are not publicly disclosed. Twitter's first A round of funding was for an undisclosed amount that is rumored to have been between US$1 million and US$5 million.[227] Its second B round of funding in 2008 was for US$22 million[228] and its third C round of funding in 2009 was for US$35 million from Institutional Venture Partners and Benchmark Capital
Benchmark Capital
along with an undisclosed amount from other investors including Union Square Ventures, Spark Capital, and Insight Venture Partners.[227] Twitter
Twitter
is backed by Union Square Ventures, Digital Garage, Spark Capital, and Bezos Expeditions.[229] In May 2008, The Industry Standard remarked that Twitter's long-term viability is limited by a lack of revenue.[230] Twitter
Twitter
board member Todd Chaffee forecast that the company could profit from e-commerce, noting that users may want to buy items directly from Twitter
Twitter
since it already provides product recommendations and promotions.[231] By March 2009 communications consultant Bill Douglass predicted in an interview that Twitter
Twitter
would be worth $1 billion within six months,[232] which came to pass when the company closed a financing round valuing it at $1 billion in September of that year.[233] The company raised US$200 million in new venture capital in December 2010, at a valuation of approximately US$3.7 billion.[234] In March 2011, 35,000 Twitter
Twitter
shares sold for US$34.50 each on Sharespost, an implied valuation of US$7.8 billion.[235] In August 2010 Twitter announced a "significant" investment led by Digital Sky Technologies that, at US$800 million, was reported to be the largest venture round in history.[236] In December 2011, the Saudi prince Alwaleed bin Talal
Alwaleed bin Talal
invested US$300 million in Twitter. The company was valued at US$8.4 billion at the time.[237] In 2016, Twitter
Twitter
was valued by Forbes
Forbes
at US$15.7 billion.[238] Revenue
Revenue
sources In July 2009, some of Twitter's revenue and user growth documents were published on TechCrunch
TechCrunch
after being illegally obtained by Hacker Croll. The documents projected 2009 revenues of US$400,000 in the third quarter and US$4 million in the fourth quarter along with 25 million users by the end of the year. The projections for the end of 2013 were US$1.54 billion in revenue, US$111 million in net earnings, and one billion users.[239] No information about how Twitter
Twitter
planned to achieve those numbers was published. In response, Twitter co-founder Biz Stone
Biz Stone
published a blog post suggesting the possibility of legal action against the hacker.[240] On April 13, 2010, Twitter
Twitter
announced plans to offer paid advertising for companies that would be able to purchase "promoted tweets" to appear in selective search results on the Twitter
Twitter
website, similar to Google
Google
Adwords' advertising model. As of April 13, Twitter
Twitter
announced it had already signed up a number of companies wishing to advertise, including Sony Pictures, Red Bull, Best Buy, and Starbucks.[241][242] The company generated US$45 million in annual revenue in 2010, after beginning sales midway through that year; the company operated at a loss through most of 2010.[234] Users' photos can generate royalty-free revenue for Twitter, and an agreement with World Entertainment News
News
Network (WENN) was announced in May 2011.[243] In June 2011, Twitter
Twitter
announced that it would offer small businesses a self-service advertising system.[244] Twitter generated US$139.5 million in advertising sales during 2011. The self-service advertising platform was launched in March 2012 to American Express
American Express
card members and merchants in the U.S. on an invite-only basis. Twitter
Twitter
later reported that numerous small businesses and people who used the self-service tool provided feedback that indicated they were impressed by the feature.[245] To continue their advertising campaign, Twitter
Twitter
announced on March 20, 2012, that promoted tweets would be introduced to mobile devices.[246] In April 2013, Twitter
Twitter
announced that its Twitter
Twitter
Ads self-service platform, consisting of promoted tweets and promoted accounts, was available to all U.S. users without an invite.[245] Twitter's financial revenue statistics for the first quarter of 2014 was reported as US$250 million.[222] On August 3, 2016, Twitter
Twitter
launched Instant Unlock Card, a new feature that encourages people to tweet about a brand in order to earn rewards and utilize the social media network's conversational ads. The format itself consists of images or videos with call-to-action buttons and a customizable hashtag.[247] Technology Implementation Twitter
Twitter
places great reliance on open-source software.[248] The Twitter
Twitter
Web interface uses the Ruby on Rails
Ruby on Rails
framework,[249] deployed on a performance enhanced Ruby Enterprise Edition implementation of Ruby.[250] In the early days of Twitter, tweets were stored in MySQL
MySQL
databases that were temporally sharded (large databases were split based on time of posting). After the huge volume of tweets coming in caused problems reading from and writing to these databases, the company decided that the system needed re-engineering.[251] As of April 6, 2011, Twitter
Twitter
engineers confirmed that they had switched away from their Ruby on Rails
Ruby on Rails
search stack to a Java server they call Blender.[8] From Spring 2007 to 2008, the messages were handled by a Ruby persistent queue server called Starling.[252] Since 2009, implementation has been gradually replaced with software written in Scala.[253] The switch from Ruby to Scala and the JVM has given Twitter
Twitter
a performance boost from 200–300 requests per second per host to around 10,000–20,000 requests per second per host. This boost was greater than the 10x improvement that Twitter's engineers envisioned when starting the switch. The continued development of Twitter
Twitter
has also involved a switch from monolithic development of a single app to an architecture where different services are built independently and joined through remote procedure calls.[251] Individual tweets are registered under unique IDs using software called snowflake, and geolocation data is added using 'Rockdove'. The URL shortner t.co then checks for a spam link and shortens the URL. Next, the tweets are stored in a MySQL
MySQL
database using Gizzard, and the user receives acknowledgement that the tweets were sent. Tweets are then sent to search engines via the Firehose API. The process is managed by FlockDB and takes an average of 350 ms.[248] On August 16, 2013, Raffi Krikorian, Twitter's Vice President of Platform Engineering, shared in a blog post that the company's infrastructure handled almost 143,000 tweets per second during that week, setting a new record. Krikorian explained that Twitter
Twitter
achieved this record by blending its homegrown and open source technologies.[251][254] The service's application programming interface (API) allows other web services and applications to integrate with Twitter.[255] Interface On April 30, 2009, Twitter
Twitter
adjusted its Web interface, adding a search bar and a sidebar of "trending topics"—the most common phrases appearing in messages. Biz Stone
Biz Stone
explains that all messages are instantly indexed and that "with this newly launched feature, Twitter has become something unexpectedly important – a discovery engine for finding out what is happening right now."[256] In March 2012, Twitter
Twitter
became available in Arabic, Farsi, Hebrew and Urdu, the first right-to-left language versions of the site. About 13,000 volunteers helped with translating the menu options.[257] In August 2012, beta support for Basque, Czech and Greek was added, making the site available in 33 different languages.[258] Outages

The Twitter
Twitter
fail whale error message

When Twitter
Twitter
experiences an outage, users once saw the "fail whale" error message image created by Yiying Lu,[259] illustrating eight orange birds using a net to hoist a whale from the ocean captioned "Too many tweets! Please wait a moment and try again."[260] In a November 2013 WIRED interview Chris Fry, VP of Engineering at that time, noted that the company had taken the "fail whale" out of production as the platform was now more stable.[261] Twitter
Twitter
had approximately ninety-eight percent uptime in 2007 (or about six full days of downtime).[262] The downtime was particularly noticeable during events popular with the technology industry such as the 2008 Macworld Conference & Expo keynote address.[263][264] Privacy, security, and harassment Twitter
Twitter
messages are public, but users can also send private messages.[265] Information about who has chosen to follow an account and who a user has chosen to follow is also public, though accounts can be changed to "protected" which limits this information (and all tweets) to approved followers.[266] Twitter
Twitter
collects personally identifiable information about its users and shares it with third parties as specified in its privacy policy. The service also reserves the right to sell this information as an asset if the company changes hands.[267] While Twitter
Twitter
displays no advertising, advertisers can target users based on their history of tweets and may quote tweets in ads[268] directed specifically to the user. A security vulnerability was reported on April 7, 2007, by Nitesh Dhanjani and Rujith. Since Twitter
Twitter
used the phone number of the sender of an SMS
SMS
message as authentication, malicious users could update someone else's status page by using SMS
SMS
spoofing.[269] The vulnerability could be used if the spoofer knew the phone number registered to their victim's account. Within a few weeks of this discovery, Twitter
Twitter
introduced an optional personal identification number (PIN) that its users could use to authenticate their SMS-originating messages.[270] On January 5, 2009, 33 high-profile Twitter
Twitter
accounts were compromised after a Twitter
Twitter
administrator's password was guessed by a dictionary attack.[271] Falsified tweets—including sexually explicit and drug-related messages—were sent from these accounts.[272] Twitter
Twitter
launched the beta version of their "Verified Accounts" service on June 11, 2009, allowing famous or notable people to announce their account name. The home pages of these accounts display a badge indicating their status.[273] In May 2010, a bug was discovered by İnci Sözlük
İnci Sözlük
that could allow a Twitter
Twitter
user to force others to follow them without the other users' consent or knowledge. For example, comedian Conan O'Brien's account, which had been set to follow only one person, was changed to receive nearly 200 malicious subscriptions.[274] In response to Twitter's security breaches, the United States
United States
Federal Trade Commission (FTC) brought charges against the service; the charges were settled on June 24, 2010. This was the first time the FTC had taken action against a social network for security lapses. The settlement requires Twitter
Twitter
to take a number of steps to secure users' private information, including maintenance of a "comprehensive information security program" to be independently audited biannually.[275] On December 14, 2010, the United States
United States
Department of Justice issued a subpoena directing Twitter
Twitter
to provide information for accounts registered to or associated with WikiLeaks.[276] Twitter
Twitter
decided to notify its users and said in a statement, "... it's our policy to notify users about law enforcement and governmental requests for their information, unless we are prevented by law from doing so."[265] A "MouseOver" exploit occurred on September 21, 2010, when an XSS Worm became active on Twitter. When a user held the mouse cursor over blacked-out parts of a tweet, the worm within the script would automatically open links and re-post itself on the reader's account.[277] The exploit was then re-used to post pop-up ads and links to pornographic sites. The origin of the worm is unclear, but Pearce H. Delphin (known on Twitter
Twitter
as @zzap) and a Scandinavian developer, Magnus Holm, both claim to have modified a related exploit found by another user (possibly Masato Kinugawa) who was using it to create coloured Tweets.[278] Kinugawa, a Japanese developer, reported the XSS vulnerability to Twitter
Twitter
on August 14. Later, when he found it was exploitable again, he created the account 'RainbowTwtr' and used it to post coloured messages.[278] Delphin says he exposed the security flaw by tweeting a JavaScript
JavaScript
function for "onMouseOver",[278] and Holm later created and posted the XSS Worm that automatically re-tweeted itself.[277] Security firm Sophos reported that the virus was spread by people doing it for "fun and games", but noted it could be exploited by cybercriminals.[277] Twitter
Twitter
issued a statement on their status blog at 13:50 UTC that "The exploit is fully patched."[277][279] Twitter
Twitter
representative Carolyn Penner said no charges would be pressed.[280] In May 2011, a claimant known as "CTB" in the case of CTB v Twitter Inc., Persons Unknown took action against Twitter
Twitter
at the British High Court of Justice,[281] requesting that the company release details of account holders. This followed gossip posted on Twitter
Twitter
about Giggs's private life. This led to the 2011 British privacy injunctions controversy and the "super-injunction".[282][283] Tony Wang, the head of Twitter
Twitter
in Europe, said that people who do "bad things" on the site would need to defend themselves under the laws of their own jurisdiction in the event of controversy, and that the site would hand over information about users to the authorities when it was legally required to do so.[284] He also suggested that Twitter
Twitter
would accede to a UK court order to divulge names of users responsible for "illegal activity" on the site.[285] Twitter
Twitter
would be acquired Dasient, a startup that offers malware protection for businesses, in January 2012. Twitter
Twitter
announced plans to use Dasient to help remove hateful advertisers on the website.[286] Twitter
Twitter
also offered a feature which would allow tweets to be removed selectively by country, before deleted tweets used to be removed in all countries.[287][288] The first use of the policy was to block the account of German neo-Nazi group Besseres Hannover (de) on October 18, 2012.[289] The policy was used again the following day to remove anti-Semitic French tweets with the hashtag #unbonjuif ("a good Jew").[290] In February 2012, a third-party public-key encryption app (written in Python and partially funded by a grant from the Shuttleworth Foundation[291]) for private messaging in Twitter, CrypTweet, was released.[292] A month later Twitter
Twitter
announced it would implement the "Do Not Track" privacy option, a cookie-blocking feature found in Mozilla's Firefox
Firefox
browser. The "Do Not Track" feature works only on sites that have agreed to the service.[293] In August 2012, it was reported that there is a market in fake Twitter followers that are used to increase politicians' and celebrities' apparent popularity.[294] The black market for the fake followers, known as "bots", has been linked to "nearly every politically linked account from the White House to Congress to the 2016 campaign trail". In June 2014, POLITICO analyzed Twitter
Twitter
handles with the highest rates of fake followers: US President Barack Obama
Barack Obama
with 46.8 percent, Democratic National Committee Chairwoman Debbie Wasserman Schultz
Debbie Wasserman Schultz
with 35.1 percent, and Senator John McCain
John McCain
with 23.6 percent. The culprits working to generate the fake followers, or "bots", include campaign workers or friends of political candidates. One site offers 1,000 fake followers for $20. The people creating the "bots" are often from Eastern Europe and Asia.[295][296] In 2013, two Italian researchers calculated 10 percent of total accounts on Twitter
Twitter
are "bots" however, other estimates have placed the figure even higher.[297] After a number of high-profile hacks of official accounts, including those of the Associated Press and The Guardian,[298] in April 2013, Twitter
Twitter
announced a two-factor login verification as an added measure against hacking.[299] In August Twitter
Twitter
announced plans to introduce a "report abuse" button for all versions of the site following uproar, including a petition with 100,000 signatures, over Tweets that included rape and death threats to historian Mary Beard, feminist campaigner Caroline Criado Perez
Caroline Criado Perez
and the member of parliament Stella Creasy.[300][301][302] Followed the sharing of images showing the killing of American journalist James Foley in 2014, Twitter
Twitter
said that in certain cases it would delete pictures of people who had died after requests from family members and "authorized individuals".[303][304] Twitter
Twitter
announced new reporting and blocking policies in December 2014,[305][306][307][308] including a blocking mechanism devised by Randi Harper, a target of GamerGate.[309][310][311] In February 2015, CEO Dick Costolo said he was 'frankly ashamed' at how poorly Twitter handled trolling and abuse, and admitted Twitter
Twitter
had lost users as a result.[312] In 2015, following an updated terms of service and privacy policy, Twitter
Twitter
users outside of the United States
United States
are legally served by the Ireland-based Twitter
Twitter
International Company instead of Twitter, Inc. The change made these users subject to Irish and European Union
European Union
data protection laws[313] In 2016, Twitter
Twitter
announced the creation of the Twitter
Twitter
Trust & Safety Council to help "ensure that people feel safe expressing themselves on Twitter." The council's inaugural members included 50 organizations and individuals.[314] Open source Twitter
Twitter
has a history of both using and releasing open source software while overcoming technical challenges of their service.[315] A page in their developer documentation thanks dozens of open source projects which they have used, from revision control software like Git to programming languages such as Ruby and Scala.[316] Software released as open source by the company includes the Gizzard Scala framework for creating distributed datastores, the distributed graph database FlockDB, the Finagle library for building asynchronous RPC servers and clients, the TwUI user interface framework for iOS, and the Bower client-side package manager.[317] The popular Twitter Bootstrap
Twitter Bootstrap
web design library was also started at Twitter
Twitter
and is the second most popular repository on GitHub.[318] Innovators patent agreement On April 17, 2012, Twitter
Twitter
announced it would implement an "Innovators Patent Agreement" which would obligate Twitter
Twitter
to only use its patents for defensive purposes. The agreement went into effect in 2012.[319]

URL shortener t.co is a URL shortening service created by Twitter.[161] It is only available for links posted to Twitter
Twitter
and not available for general use.[161] All links posted to Twitter
Twitter
use a t.co wrapper.[320] Twitter hopes that the service will be able to protect users from malicious sites,[161] and will use it to track clicks on links within tweets.[161][321] Having used the services of third parties TinyURL and bit.ly,[322] Twitter
Twitter
began experimenting with its own URL shortening service for private messages in March 2010 using the twt.tl domain,[320] before it purchased the t.co domain. The service was tested on the main site using the accounts @TwitterAPI, @rsarver and @raffi.[320] On September 2, 2010, an email from Twitter
Twitter
to users said they would be expanding the roll-out of the service to users. On June 7, 2011, Twitter announced that it was rolling out the feature.[162] Integrated photo-sharing service On June 1, 2011, Twitter
Twitter
announced its own integrated photo-sharing service that enables users to upload a photo and attach it to a Tweet right from Twitter.com.[323] Users now also have the ability to add pictures to Twitter's search by adding hashtags to the tweet.[324] Twitter
Twitter
also plans to provide photo galleries designed to gather and syndicate all photos that a user has uploaded on Twitter
Twitter
and third-party services such as TwitPic.[324] Twitterbots A Twitterbot is a computer program that automatically posts on Twitter, they are programmed to tweet, retweet, and follow other accounts. According to a recent report, there were 20 million, fewer than 5%, of accounts on Twitter
Twitter
that were fraudulent in 2013. These fake accounts are often used to build large follower populations quickly for advertisers, while others respond to tweets that include a certain word or phrase.[325] Twitter's wide-open application programming interface and cloud servers make it possible for twitterbots' existence within the social networking site.[326] Developers Twitter
Twitter
is recognized for having one of the most open and powerful developer APIs of any major technology company.[327] Developer interest in Twitter
Twitter
began immediately following its launch, prompting the company to release the first version of its public API in September 2006.[328] The API quickly became iconic as a reference implementation for public REST APIs and is widely cited in programming tutorials.[329] From 2006 until 2010, Twitter's developer platform experienced strong growth and a highly favorable reputation. Developers built upon the public API to create the first Twitter
Twitter
mobile phone clients as well as the first URL shortener. Between 2010 and 2012, however, Twitter
Twitter
made a number of decisions that were received unfavorably by the developer community.[330] In 2010, Twitter
Twitter
mandated that all developers adopt OAuth
OAuth
authentication with just 9 weeks of notice.[331] Later that year, Twitter
Twitter
launched its own URL shortener, in direct competition with some of its most well-known 3rd-party developers.[332] And in 2012, Twitter
Twitter
introduced strict usage limits for its API, "completely crippling" some developers.[333] While these moves successfully increased the stability and security of the service, they were broadly perceived as hostile to developers, causing them to lose trust in the platform.[334] In an effort to reset its relationship with developers, Twitter acquired Crashlytics on January 28, 2013 for over USD $100 million, its largest acquisition to date.[335] Founded by Jeff Seibert and Wayne Chang, Crashlytics had rapidly gained popularity as a tool to help mobile developers identify and fix bugs in their apps.[336] Twitter
Twitter
committed to continue supporting and expanding the service.[337] In October 2014, Twitter
Twitter
announced Fabric, a suite of mobile developer tools built around Crashlytics.[338] Fabric brought together Crashlytics, Answers (mobile app analytics), Beta (mobile app distribution), Digits (mobile app identity and authentication services), MoPub, and TwitterKit (login with Twitter
Twitter
and Tweet display functionality) into a single, modular SDK, allowing developers to pick and choose which features they needed while guaranteeing ease of installation and compatibility. By building Fabric on top of Crashlytics, Twitter
Twitter
was able to take advantage of Crashlytics' large adoption and device footprint to rapidly scale usage of MoPub and TwitterKit. Fabric reached active distribution across 1 billion mobile devices just 8 months after its launch.[339] In early 2016, Twitter
Twitter
announced that Fabric was installed on more than 2 billion active devices and used by more than 225,000 developers. Fabric is recognized as the #1 most popular crash reporting and also the #1 mobile analytics solution among the top 200 iOS apps, beating out Google
Google
Analytics, Flurry, and MixPanel.[340][341] Society

Dorsey (left) said after a Twitter
Twitter
Town Hall with Barack Obama
Barack Obama
held in July 2011, that Twitter
Twitter
received over 110,000 #AskObama tweets.[342]

Main article: Twitter
Twitter
usage See also: Censorship of Twitter Issues and controversies See also: List of Twitter controversies and List of people suspended from Twitter Twitter
Twitter
has been used for a variety of purposes in many industries and scenarios. For example, it has been used to organize protests, sometimes referred to as " Twitter
Twitter
Revolutions",[343] which include April 2009 Moldovan parliamentary election protests, 2009 student protests in Austria, 2009 Gaza–Israel conflict, 2009 Iran green revolution, 2009 Toronto G20, 2010 Bolivarian Revolution, 2010 Germany Stuttgart21, 2011 Egypt
Egypt
Revolution, 2011 England riots, 2011 United States Occupy movement, 2011 Anti-austerity movement in Spain, 2011 Greece Aganaktismenoi movements, 2011 Italy Rome demonstration, 2011 Wisconsin labor protests, 2012 Gaza–Israel conflict, 2013 protests in Brazil, 2013 Gezi Park protests.[344] A result of the Iranian election protests saw the government of Iran block Twitter
Twitter
in censorship.[345] The service is also used as a form of civil disobedience: In 2010, users expressed outrage over the Twitter Joke Trial
Twitter Joke Trial
by copying a controversial joke about bombing an airport and attaching the hashtag #IAmSpartacus, a reference to the Spartacus film and a sign of solidarity and support to a man controversially prosecuted after posting a tweet joking about bombing an airport if they cancelled his flight. #IAmSpartacus became the number one trending topic on Twitter worldwide.[346] Another case of civil disobedience happened in the 2011 British privacy injunction debate, where several celebrities who had taken out anonymized injunctions were identified by thousands of users in protest to traditional journalism being censored.[347] During the Arab Spring
Arab Spring
in early 2011, the number of hashtags mentioning the uprisings in Tunisia
Tunisia
and Egypt
Egypt
increased.[348] A study by the Dubai School of Government found that only 0.26% of the Egyptian population, 0.1% of the Tunisian population and 0.04% of the Syrian population are active on Twitter.[349] In January 2016, Twitter
Twitter
was sued by the widow of a U.S. man killed in the 2015 Amman shooting attack, claiming that allowing the Islamic State of Iraq
Iraq
and the Levant (ISIL) to continually use the platform, including direct messages in particular,[350] constituted the provision of material support to a terrorist organization, which is illegal under U.S. federal law. Twitter
Twitter
disputed the claim, stating that "violent threats and the promotion of terrorism deserve no place on Twitter
Twitter
and, like other social networks, our rules make that clear."[351][352] The lawsuit was dismissed by the United States District Court for the Northern District of California, upholding the Section 230 safe harbor, which dictates that the operators of an interactive computer service are not liable for the content published by its users.[352][353] The lawsuit was revised in August 2016, providing comparisons to other telecommunications devices.[350] Twitter
Twitter
suspended multiple parody accounts that satirized Russian politics in May 2016, sparking protests and raising questions about where the company stands on freedom of speech.[354] Following public outcry, Twitter
Twitter
restored the accounts the next day without eplaining why the accounts had been suspended.[355] The same day, Twitter, along with Facebook, Google, and Microsoft, jointly agreed to a European Union code of conduct obligating them to review "[the] majority of valid notifications for removal of illegal hate speech" posted on their services within 24 hours.[356] In August 2016, Twitter
Twitter
stated that it had banned 235,000 accounts over the past six months, bringing the overall number of suspended accounts to 360,000 accounts in the past year, for violating policies banning use of the platform to promote extremism.[357] In October 2017, actress Rose McGowan
Rose McGowan
said that Twitter
Twitter
had suspended her account for 12 hours after she repeatedly tweeted about former film studio executive Harvey Weinstein's alleged sexual misconduct toward her and others. Twitter
Twitter
explained that McGowan's account had violated its privacy policy because one of her tweets included a private phone number. According to The New York Times, "Many Twitter users expressed outrage over Ms. McGowan's account being locked". After the tweet was removed, her account was unlocked several hours before the 12-hour ban was set to expire. A Twitter
Twitter
representative stated, "We will be clearer about these policies and decisions in the future."[358][359] Later that day, software engineer Kelly Ellis, using the hashtag #WomenBoycottTwitter, urged women to shun Twitter for 24 hours, beginning at midnight, in solidarity with McGowan and, tweeted Ellis, "all the victims of hate and harassment Twitter
Twitter
fails to support." The boycott was joined by activists, celebrities and journalists.[360] In November 2017, the Paradise Papers, a set of confidential electronic documents relating to offshore investment, revealed that Twitter
Twitter
is among the corporations that avoided paying taxes using offshore companies.[361] Later The New York Times
The New York Times
reported that Russian-American billionaire Yuri Milner
Yuri Milner
had strong Kremlin backing for his investments in Facebook
Facebook
and Twitter.[362] Censorship Main article: Censorship of Twitter Twitter
Twitter
is banned completely in Iran, China and North Korea,[363] and has been intermittently blocked in numerous countries including Egypt, Iraq, Turkey
Turkey
and Venezuela
Venezuela
on different bases.[364][365][366][367] In 2016, Twitter
Twitter
cooperated with the Israeli government to remove certain content originating outside Israel from tweets seen in Israel.[368] In the 11th biannual transparency report published on September 19, 2017, Twitter
Twitter
said that Turkey
Turkey
was the first among countries where about 90 percent of removal requests came from, followed by Russia, France and Germany.[369] As part of evidence to a US Senate Enquiry, the company admitted that their systems "detected and hid" several hundred thousand tweets relating to the 2016 Democratic National Committee email leak.[370] Trending topics After claims in the media that the hashtags #wikileaks and #occupywallstreet were being censored because they did not show up on the site's list of trending topics, Twitter
Twitter
responded by stating that it does not censor hashtags unless they contain obscenities.[371][372][373] In 2016, at the same time as Twitter
Twitter
executives paid to attend a political fundraiser by Hillary Clinton, the Twitter
Twitter
platform banned a pro- Bernie Sanders
Bernie Sanders
account that had started a hashtag critical of Clinton's fundraising from wealthy donors.[374] Trust & Safety Council The announcement of Twitter's "Trust & Safety Council" was met with objection from parts of its userbase.[375][376] Critics accused the member organizations of being heavily skewed towards "the restriction of hate speech" and a Reason article expressed concern that "there’s not a single uncompromising anti-censorship figure or group on the list".[377][378] Impact Instant, short, and frequent communication In May 2008, The Wall Street Journal
The Wall Street Journal
wrote that social networking services such as Twitter
Twitter
"elicit mixed feelings in the technology-savvy people who have been their early adopters. Fans say they are a good way to keep in touch with busy friends. But some users are starting to feel too connected, as they grapple with check-in messages at odd hours, higher cellphone bills and the need to tell acquaintances to stop announcing what they're having for dinner."[379] The following year, John C. Dvorak
John C. Dvorak
described Twitter
Twitter
as "the new CB radio".[380] Emergency use A practical use for Twitter's real-time functionality is as an effective de facto emergency communication system for breaking news. It was neither intended nor designed for high-performance communication, but the idea that it could be used for emergency communication was not lost on the creators, who knew that the service could have wide-reaching effects early on when the company used it to communicate during earthquakes.[381] Another practical use that is being studied is Twitter's ability to track epidemics and how they spread.[382] In addition, Twitter
Twitter
has acted as a sensor for automatic response to natural disasters such as bush fires.[383][384] Education Twitter
Twitter
has been adopted as a communication and learning tool in educational and research[385] settings mostly in colleges and universities.[386][387] It has been used as a backchannel to promote student interactions, especially in large-lecture courses.[388] Research has found that using Twitter
Twitter
in college courses helps students communicate with each other and faculty, promotes informal learning, allows shy students a forum for increased participation, increases student engagement, and improves overall course grades.[389][390][391] Public figures Tech writer Bruce Sterling
Bruce Sterling
commented in 2007 that using Twitter
Twitter
for "literate communication" is "about as likely as firing up a CB radio and hearing some guy recite the Iliad".[392] In September 2008, the journalist Clive Thompson mused in a New York Times
New York Times
Magazine editorial that the service had expanded narcissism into "a new, supermetabolic extreme—the ultimate expression of a generation of celebrity-addled youths who believe their every utterance is fascinating and ought to be shared with the world".[393] One of the earliest documented forms of celebrity-related Twitter-like disclosures dates from 1980, when real estate mogul William Desmond Ryan made round-the-clock press releases about his relationship with comedian Phyllis Diller, even revealing what she was making him for dinner on a nightly basis.[394] Conversely, Vancouver Sun
Vancouver Sun
columnist Steve Dotto opined that part of Twitter's appeal is the challenge of trying to publish such messages in tight constraints,[395] and Jonathan Zittrain, professor of Internet
Internet
law at Harvard Law School, said that "the qualities that make Twitter
Twitter
seem inane and half-baked are what makes it so powerful."[396] The novelist Rick Moody
Rick Moody
wrote a short story for Electric Literature called "Some Contemporary Characters," composed entirely of tweets.[397] In 2009, Nielsen Online
Nielsen Online
reported that Twitter
Twitter
had a user-retention rate of forty percent. Many people stop using the service after a month; therefore the site may potentially reach only about ten percent of all Internet
Internet
users.[398] In 2009, Twitter
Twitter
won the "Breakout of the Year" Webby Award.[399][400] During a February 2009 discussion on National Public Radio's Weekend Edition, the journalist Daniel Schorr stated that Twitter
Twitter
accounts of events lacked rigorous fact-checking and other editorial improvements. In response, Andy Carvin
Andy Carvin
gave Schorr two examples of breaking news stories that played out on Twitter
Twitter
and said users wanted first-hand accounts and sometimes debunked stories.[401] On November 29, 2009, Twitter
Twitter
was named the Word of the Year by the Global Language Monitor, declaring it "a new form of social interaction".[402] Time magazine acknowledged its growing level of influence in its 2010 Time 100; to determine the influence of people, it used a formula based on famous social networking sites, Twitter
Twitter
and Facebook. The list ranges from Barack Obama
Barack Obama
and Oprah Winfrey to Lady Gaga
Lady Gaga
and Ashton Kutcher.[403][404] The U.S. government, seeing social media's role in the 2010 Arab Spring revolts, covertly developed a Cuban alternative to Twitter
Twitter
called ZunZuneo
ZunZuneo
as part of a long-term strategy to "stir unrest". The service was active from 2010 to 2012.[405] During the 2012 Summer Olympics opening ceremony, in which he appeared at the London Olympic Stadium in person,[406] Sir Tim Berners-Lee, the founder of the World Wide Web, tweeted "This is for everyone",[407] which was instantly spelled out in LCD
LCD
lights attached to the chairs of the 80,000 people in the audience.[406] World leaders World leaders and their diplomats have taken note of Twitter's rapid expansion and have been increasingly utilizing Twitter
Twitter
diplomacy, the use of Twitter
Twitter
to engage with foreign publics and their own citizens. US Ambassador to Russia, Michael A. McFaul
Michael A. McFaul
has been attributed as a pioneer of international Twitter
Twitter
diplomacy. He used Twitter
Twitter
after becoming ambassador in 2011, posting in English and Russian.[408] On October 24, 2014, Queen Elizabeth II
Queen Elizabeth II
sent her first tweet to mark the opening of the London Science Museum's Information Age exhibition.[409] A 2013 study by website Twiplomacy found that 153 of the 193 countries represented at the United Nations
United Nations
had established government Twitter
Twitter
accounts.[410] The same study also found that those accounts amounted to 505 Twitter
Twitter
handles used by world leaders and their foreign ministers, with their tweets able to reach a combined audience of over 106 million followers.[410] According to an analysis of accounts, the heads of state of 125 countries and 139 other leading politicians have Twitter
Twitter
accounts that have between them sent more than 350,000 tweets and have almost 52 million followers. However, only 30 of these do their own tweeting, more than 80 do not subscribe to other politicians and many do not follow any accounts.[411] Religion More than twenty Roman Catholic cardinals manage active Twitter accounts,[412] nine of whom were cardinal electors for the 2013 Papal conclave.[413] Pope Benedict XVI's Twitter
Twitter
account was set up in 2012. As of April 2016, his successor, Pope Francis, has 9.06 million followers of his Twitter
Twitter
account (@Pontifex).[414] In a 2015 European Foundation for Democracy-European Policy Centre policy dialogue panel in Brussels, Mark Wallace, CEO of the "CounterExtremism Project" and former U.S ambassador to the United Nations, said: “ Twitter
Twitter
is currently the ´gateway drug´ for those seeking to recruit fighters for Islamic terrorism and this must be stopped.” [415] Twitterbot effect Twitterbots are capable of influencing public opinion about culture, products and political agendas by automatically generating mass amounts of tweets through imitating human communication.[416] The New York Times states, "They have sleep-wake cycles so their fakery is more convincing, making them less prone to repetitive patterns that flag them as mere programs."[417] The tweets generated vary anywhere from a simple automated response to content creation and information sharing, all of which depends on the intention of the person purchasing or creating the bot. The social implications these Twitterbots potentially have on human perception are sizeable according to a study published by the ScienceDirect Journal. Looking at the Computers as Social Actors (CASA) paradigm, the journal notes, "people exhibit remarkable social reactions to computers and other media, treating them as if they were real people or real places." The study concluded that Twitterbots were viewed as credible and competent in communication and interaction making them suitable for transmitting information in the social media sphere.[418] While the technological advances have enabled the ability of successful Human-Computer Interaction, the implications are questioned due to the appearance of both benign and malicious bots in the Twitter
Twitter
realm. Benign Twitterbots may generate creative content and relevant product updates whereas malicious bots can make unpopular people seem popular, push irrelevant products on users and spread misinformation, spam and/or slander.[419] In addition to content generating bots, users can purchase followers, favorites, retweets and comments on various websites that cater to expanding a user's image through accumulation of followers. With more followers, users' profiles gain more attention, thus increasing their popularity.[420] Generating Web traffic is a valuable commodity for both individuals and businesses because it indicates notability.[421] With Twitterbots, users are able to create the illusion of "buzz" on their site by obtaining followers from services such as Swenzy and underground suppliers who operate bot farms or click farms.[416][421] The companies that facilitate this service create fake Twitter accounts that follow a number of people, some of these Twitter accounts may even post fake tweets to make it seem like they are real. This practice of obtaining mass amounts of twitterbots as followers is not permitted on Twitter.[422] The emphasis on followers and likes as a measure of social capital has urged people to extend their circle to weak and latent ties to promote the idea of popularity for celebrities, politicians, musicians, public figures, and companies alike.[423] According to The New York Times, bots amass significant influence and have been noted to sway elections, influence the stock market, public appeal, and attack governments.[424] GCHQ According to documents leaked by Edward Snowden
Edward Snowden
and published in July 2014, the United Kingdom's GCHQ
GCHQ
has a tool named BIRDSONG for "automated posting of Twitter
Twitter
updates", and a tool named BIRDSTRIKE for " Twitter
Twitter
monitoring and profile collection".[425][426] Television Twitter
Twitter
is also increasingly used for making TV more interactive and social.[427] This effect is sometimes referred to as the second screen[428], "virtual watercooler" or social television—the practice has been called "chatterboxing".[429] Twitter
Twitter
has been successfully used to encourage people to watch live TV events, such as the Oscars, the Super Bowl[430] and the MTV
MTV
Video Music Awards; however this strategy has proven less effective with regularly scheduled TV shows.[431] Such direct cross-promotions have been banned from French television due to regulations against secret advertising.[432] In December 2012, Twitter
Twitter
and Nielsen entered a multi-year agreement to produce social TV ratings, which are expected to be commercially available for the fall 2013 season as the Nielsen Twitter
Twitter
TV Rating.[433][434] Advertising
Advertising
Age said Twitter
Twitter
had become the new TV Guide.[435] Then in February 2013, Twitter
Twitter
acquired Bluefin Labs
Bluefin Labs
for an estimated US$50 million to $100 million. Founded in 2008 at the MIT Media Lab, Bluefin is a data miner whose analysis tells which brands (e.g., TV shows and companies) are chatted about the most in social media.[433][434][436] MIT Technology Review
Technology Review
said that Bluefin gives Twitter
Twitter
part of the US$72 billion television advertising market.[437] In May 2013, it launched Twitter
Twitter
Amplify—an advertising product for media and consumer brands.[438] With Amplify, Twitter
Twitter
runs video highlights from major live broadcasts, with advertisers' names and messages playing before the clip.[439] In October 2013, Comcast announced that it had partnered with Twitter
Twitter
to implement its "See It" feature within the service, allowing posts promoting programs on selected NBCUniversal
NBCUniversal
channels to contain direct links to TV Everywhere streaming to the program. On launch, the concept was limited to NBCUniversal
NBCUniversal
channels and Xfinity
Xfinity
cable television subscribers.[440] In an attempt to compete with Twitter's leadership in TV, Facebook introduced a number of features in 2013 to drive conversation about TV including hashtags, verified profiles and embeddable posts. It also opened up new data visualization APIs for TV news and other media outlets, enabling them to search for a word and see a firehose of public posts that mention it as well as show how many people mentioned a word in both public and private posts during a set time frame, with a demographic breakdown of the age, gender, and location of these people.[441] In January 2014, Facebook
Facebook
announced a partnership with UK-based social TV analytics company SecondSync which saw the social network make its social TV available outside the company for the first time. Facebook
Facebook
struck the partnership to help marketers understand how people are using the social network to talk about topics such as TV.[442] However, Twitter
Twitter
responded by acquiring SecondSync and Parisian social TV firm Mesagraph three months later. These acquisitions, as well as a partnership with research company Kantar (which it had been working with to develop a suite of analytics tools for the British TV industry since August 2013) strengthened Twitter's dominance of the "second screen" – TV viewers using tablets and smartphones to share their TV experience on social media. With the additional analytic tools, Twitter
Twitter
was able to improve the firm's offering to advertisers, allowing them to, for instance, only promote a tweet onto the timelines of users who were watching a certain programme.[443] By February 2014, all four major U.S. TV networks had signed up to the Amplify program, bringing a variety of premium TV content onto the social platform in the form of in-tweet real-time video clips.[444] In March 2014, ITV became the first major broadcaster in the UK to sign up to Twitter
Twitter
Amplify[445] and Twitter
Twitter
introduced one-tap video playback across its mobile apps to further enhance the consumer experience.[446] In June 2014, Twitter
Twitter
acquired its Amplify partner in the U.S., SnappyTV.[447] In Europe, Twitter's Amplify partner is London-based Grabyo, which has also struck numerous deals with broadcasters and rights holders[75] to share video content across Facebook
Facebook
and Twitter.[448] In July 2017, Twitter
Twitter
announced that it would wind down SnappyTV as a separate company, and integrate its features into the Media Studio suite on Twitter.[449] Statistics User accounts with large follower base Main article: List of most followed users on Twitter As of February 24, 2018, the ten Twitter
Twitter
accounts with the most followers were:[450]

Rank Username Owner Followers

1. @katyperry Katy Perry 108,590,615

2. @justinbieber Justin Bieber 105,379,896

3. @BarackObama Barack Obama 100,229,952

4. @rihanna Rihanna 86,236,922

5. @taylorswift13 Taylor Swift 85,593,559

6. @ladygaga Lady Gaga 77,170,396

7. @TheEllenShow Ellen DeGeneres 76,898,977

8. @YouTube YouTube 71,145,354

9. @Cristiano Cristiano Ronaldo 69,678,119

10. @jtimberlake Justin Timberlake 65,298,543

Oldest accounts The oldest Twitter
Twitter
accounts are 14 accounts that became active on March 21, 2006, all belonging to Twitter
Twitter
employees at the time and including @jack (Jack Dorsey), @biz (Biz Stone), and @noah (Noah Glass).[451] Record tweets Main articles: List of most retweeted tweets
List of most retweeted tweets
and List of most liked tweets A selfie orchestrated by 86th Academy Awards
86th Academy Awards
host Ellen DeGeneres during the March 2, 2014 broadcast was at the time the most retweeted image ever.[452][453] DeGeneres said she wanted to homage Meryl Streep's record 17 Oscar nominations by setting a new record with her, and invited other Oscar celebrities to join them. The resulting photo of twelve celebrities broke the previous retweet record within forty minutes, and was retweeted over 1.8 million times in the first hour.[454][455][456] By the end of the ceremony it had been retweeted over 2 million times; less than 24 hours later, it had been retweeted over 2.8 million times.[453][454] As of 18 March 2014[update], it has been retweeted over 3.4 million times.[453] The group selfie effort was parodied by Lego, and Matt Groening
Matt Groening
with The Simpsons.[457][458] It beat the previous record, 778,801, which was held by Barack Obama, following his victory in the 2012 presidential election.[456][459][460] On May 9, 2017, Ellen's record was broken by Carter Wilkerson (@carterjwm) by collecting nearly 3.5 million retweets in a little over a month.[461] According to Guinness World Records, the fastest pace to a million followers was set by actor Robert Downey Jr.
Robert Downey Jr.
in 23 hours and 22 minutes in April 2014.[462] This record was later broken by Caitlyn Jenner, who joined the site on June 1, 2015 and amassed a million followers in just 4 hours and 3 minutes. The most tweeted moment in the history of Twitter
Twitter
was during the airing of Castle in the Sky
Castle in the Sky
on August 2, 2013, when fans tweeted the word "balse" at the exact time that it played in the movie. There was a global peak of 143,199 tweets in one second, beating the previous record of 33,388.[463] With over 41 million tweets,[464] the most discussed topic ever on Twitter
Twitter
was the "#ALDubEBTamangPanahon" of AlDub
AlDub
on October 24, 2015 during the sold out special concert presentation of the Kalyeserye segment of the noontime show Eat Bulaga[465] entitled Eat Bulaga: Sa Tamang Panahon held at the Philippine Arena, the world's largest indoor arena located in Bulacan, Philippines. The said event was attended by over 55,000 fans. With over 35.6 million tweets, the most discussed sports game ever on Twitter
Twitter
was the 2014 FIFA World Cup semi-final between Brazil and Germany on July 8, 2014.[466] On the day of the 2016 U.S. presidential election, Twitter
Twitter
proved to be the largest source of breaking news, with over 40 million tweets sent that day.[20] See also

Companies portal

Ambient awareness Comparison of microblogging services List of mergers and acquisitions by Twitter List of virtual communities with more than 100 million users Twitterature Twitter
Twitter
usage—How various people and organizations use Twitter Timeline of social media

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Further reading

Fitton, Laura; Gruen, Michael E.; Poston, Leslie; foreword by Jack Dorsey (2009). Twitter
Twitter
for Dummies. Hoboken, NJ: Wiley Publishing. ISBN 9780470479919. 

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v t e

Social networking
Social networking
services

Websites

Personal

23snaps Amikumu aNobii AsianAve ASKfm Badoo Bebo Cloob Cyworld Diaspora Draugiem.lv Ello Facebook Foursquare Gab Google+ Hello Hi5 Highlight Idka Instagram Keek LiveJournal Lifeknot LockerDome Marco Polo Mastodon MeetMe Miaopai micro.blog MixBit Mixi Musical.ly Myspace Nasza-klasa.pl Nextdoor OK.ru Path Peach Periscope Pinterest Pixnet Qzone Readgeek Renren Sina Weibo Slidely Snapchat SNOW Spaces Spring.me Streetlife StudiVZ Swarm Tagged Taringa! tbh Tea Party Community Tinder Tout Tuenti TV Time Tumblr Twitter Untappd VK Whisper Xanga Yo

Professional

Academia.edu Brainly BranchOut Edmodo IBM
IBM
Connections LinkedIn Moodle ResearchGate Sciencescape
Sciencescape
(Metaα) Solaborate Viadeo XING IdeaPlane Yammer

Defunct

App.net Avatars United Bolt Capazoo eConozco Emojli FitFinder Formspring FriendFeed Friends Reunited Friendster Grono.net Google
Google
Buzz Heello Hyves iTunes Ping iWiW Jaiku LunarStorm Me2day Meerkat Mobli Mugshot Natter Social Network Netlog Orkut Pheed Piczo PlanetAll Posterous Pownce Qaiku SixDegrees.com So.cl Surfbook Tribe.net Tsū tvtag Vine Windows Live Spaces Wretch Yahoo! 360° Yahoo! Kickstart Yahoo! Mash Yahoo! Meme Yik Yak

White-label services

Ning Wall.fm

Tools

Social network
Social network
analysis software Diaspora (software) Web 2.0 Suicide Machine

General

Comparison of software Online identity User profile Virtual community 1+ million users 100+ million users

Applications

Social network
Social network
advertising Social network
Social network
hosting service Online dating service
Online dating service
(comparison) Mobile

User interface

Activity stream Brand page Like button Hashtag Groups Reblogging Polling Internet
Internet
petitions

Implications

Privacy issues User gender difference Use in investigations

Related concepts

Small-world experiment Small-world network Social network Cybersectarianism Panopticon

Protocols

Micropub Webmention

Defunct

Distributed Social Networking Protocol OpenSocial

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Censorship and websites

Censorship of

Facebook File
File
sharing sites GitHub iTunes Store The Pirate Bay Twitter WikiLeaks

Reception in the United States

Wikipedia YouTube

in Germany

Censorship by

AOL Apple Cisco in China Google Microsoft
Microsoft
in China Myspace

in China

Skype
Skype
in China Yahoo Facebook YouTube Twitter

Websites blocked in

Belgium Mainland China India Pakistan Russia South Korea

North Korean

United Kingdom

list

v t e

Major Internet
Internet
companies

Companies with an annual revenue of over US$2 billion

Largest Internet
Internet
companies

Baidu Facebook FMG/Fusion Media Group Google InterActiveCorp Microsoft Naver NetEase Netflix Tencent Twitter Uber Vox Media Yandex

Cloud computing

Akamai Technologies Alibaba Cloud Amazon Web Services Google IBM Microsoft Oracle Corporation Rackspace Salesforce.com

E-commerce
E-commerce
only

Alibaba Group Amazon.com eBay Flipkart Groupon JD.com Shopify Rakuten

See also Largest IT companies List of largest Internet
Internet
companies Category: Internet
Internet
companies

v t e

Andreessen Horowitz

Founders

Marc Andreessen
Marc Andreessen
(co-founder) Ben Horowitz
Ben Horowitz
(co-founder)

General Partners

John O'Farrell Scott Weiss Jeff Jordan Peter Levine Chris Dixon Lars Dalgaard Vijay S. Pande Alex Rampell Martin Casado

Investments

Airbnb Apptio Facebook Foursquare Groupon Lytro Skype Twitter ThirdLove Zynga

Authority control

WorldCat Identities VIAF: 125720882 LCCN: n2009031956 GND: 7660487-

.