Twitter Inc. is based in San Francisco, with additional servers and offices in New York City.
Twitter, Inc.
|
| Type | Private |
| Founded | San Francisco, California, U.S. |
| Founder(s) | Jack Dorsey, Noah Glass,
Evan Williams, Biz Stone |
| Headquarters | 795 Folsom Street, Suite 600,
San Francisco, CA 94107, United States[1] |
| Area served | Worldwide |
| Key people | Dick Costolo (CEO)
Jack Dorsey
(Executive Chairman)
Evan Williams (Director)
Biz Stone (Creative director) |
| Industry | Internet |
| Revenue | US$ 140 million (2010 est.) |
| Employees | 600+ (2011)[4] |
| Website | Twitter.com |
| Alexa rank | 9 (March 2012)[5] |
| Type of site | Social network service,microblogging |
| Registration | Required (to post, follow or be followed) |
| Users | Over 350 million (June 2011)[6] |
| Available in | Multilingual |
| Launched | July 15, 2006[7] |
| Current status | Active |
|
Creation
Twitter's origins lie in a "daylong brainstorming session" held by board members of the
podcasting company
Odeo. Dorsey introduced the idea of an individual using an SMS service to communicate with a small group.
[11] The original
project code name for the service was
twttr, an idea that Williams later ascribed to
Noah Glass,
[12] inspired by
Flickr and the five-character length of American SMS
short codes. The developers initially considered "10958" as a short code, but later changed it to "40404" for "ease of use and memorability." Work on the project started on March 21, 2006, when Dorsey published the first Twitter message at 9:50 PM
Pacific Standard Time (PST): "just setting up my twttr".
[14]"...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." –
Jack Dorsey[15]
The first Twitter prototype was used as an internal service for Odeo employees and the full version was introduced publicly on July 15, 2006.
[7] In October 2006,
Biz Stone,
Evan Williams, Dorsey, and other members of Odeo formed Obvious Corporation and acquired Odeo and all of its assets – including Odeo.com and Twitter.com – from the investors and shareholders.
[16] Williams fired Glass who was silent about his part in Twitter's startup until 2011.
[17] Twitter spun off into its own company in April 2007.
[18]Reaction
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.
[19] "The Twitter people cleverly placed two 60-inch plasma screens in the conference hallways, exclusively streaming 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."
[20]Reaction at the conference was highly positive. Blogger Scott Beale said that Twitter "absolutely rul
[ed]" SXSWi. Social software researcher
Danah Boyd said Twitter "own
[ed]" the conference.
[21]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!"
[22]
Previous Twitter logo, used until September 14, 2010.
The first unassisted off-Earth Twitter message was posted from the
International Space Station by
NASA astronaut T. J. Creamer on January 22, 2010.
[23] By late November 2010, an average of a dozen updates per day were posted on the astronauts' communal account, @NASA_Astronauts. NASA has also hosted over 25
"tweetups", events that provide guests with VIP access to NASA facilities and speakers with the goal of leveraging participants' social networks to further the outreach goals of NASA.
On September 14, 2010, Twitter launched a redesigned site
[25] including a new logo.
[citation needed]Leadership
On October 16, 2008,
[27] Williams took over the role of CEO, and Dorsey became chairman of the board.
[28]According to
The New York Times, "Mr. Dorsey and Mr. Costolo forged a close relationship" when Williams was away.
[30] According to
PC Magazine, Williams was "no longer involved in the day-to-day goings on at the company". He is focused on developing a new startup, but he became a member of Twitter's board of directors, and promised to "help in any way I can". Stone is still with Twitter but is working with AOL as an "advisor on volunteer efforts and philanthropy".
[31]Dorsey rejoined Twitter in March 2011, as executive chairman focusing on product development. His time is split with
Square (where he is CEO), whose offices are within walking distance of Twitter's in San Francisco.
[30]In September 2011, Board Members and investors
Fred Wilson and Bijan Sabet resigned from Twitter's Board of Directors.
[32]Growth
The company experienced rapid 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 users were sending 50 million tweets per day.
[33] By March 2010, the company recorded over 70,000 registered applications.
[34] As of June 2010, about 65 million tweets were posted each day, equaling about 750 tweets sent each second, according to Twitter.
[35] As of March 2011, that was about 140 million tweets posted daily.
[36] 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.
[37]Twitter's usage spikes during prominent events. For example, a record was set during the
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, 2010. 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, 2010,
[38] and then again at the close of Japan's victory over Denmark in the World Cup when users published 3,283 tweets per second.
[39] The current record was set during the
2011 FIFA Women's World Cup Finalbetween Japan and the United States, when 7,196 tweets per second were published.
[40] When American singer
Michael Jackson died on June 25, 2009, Twitter servers crashed after users were updating their status to include the words "Michael Jackson" at a rate of 100,000 tweets per hour.
[41]Twitter acquired application developer Atebits on April 11, 2010. Atebits had developed the
Apple Design Award-winning Twitter client
Tweetie for the
Mac and
iPhone. The application, now called "Twitter" and distributed free of charge, is the official Twitter client for the iPhone,
iPad and Mac.
[42]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 itself by clicking on individual tweets which contain links to images and clips from a variety of supported websites including
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 experience" had been rolled out to all users.
On April 5, 2011, Twitter tested a new homepage and phased out the "Old Twitter."
[43] 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.
[44][45]On December 8, 2011, 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
Homebutton, the
Connect and
Discover buttons were introduced along with a redesigned profile and timeline of Tweets. The site's layout has been compared to that of
Facebook.
[46][47]On February 21, 2012, it was announced that twitter and 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 content where Twitter users go.
[48]"Larry the Bird" Logo
On Monday, February 27, 2012, 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 of the NBA's
Boston Celtics fame. This detail was confirmed when the Boston Celtic's director of interactive media asked Twitter co-founder Biz Stone about it in August 2011.
[49]Features
Tweets are publicly visible by default; however, senders can restrict message delivery to just their followers. Users can tweet via the Twitter website, compatible external applications (such as for
smartphones), or by
Short Message Service (SMS) available in certain countries.
[50] While the service is free, accessing it through SMS may incur
phone service provider fees.
Users may subscribe to other users' tweets – this is known as
following and subscribers are known as
followers[51] or
tweeps (Twitter + peeps).
[52] The users can also check the people who are un-subscribing them on Twitter better known as unfollowing via various services.
[53]Twitter allows users the ability to update their profile by using their mobile phone either by text messaging or by apps released for certain smartphones / tablets.
[54]As a social network, Twitter revolves around the principle of followers. When you choose to follow another 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.
In June 2008, Twitter launched a verification program, allowing celebrities to get their accounts verified.
[57] Originally intended to help users verify which celebrity accounts were created by the celebrities themselves (and therefore are not fake), they have since been used to verify accounts of businesses and accounts for public figures who may not actually tweet but still wish to maintain control over the account that bears their name - for example, the
Dalai Lama. Verified accounts can be identified by a white tick on a blue background, known as a verified badge, next to the user's full name, on the profile itself or next to the name in search results.
Messages
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.
[58] To repost a message from another Twitter user, and share it with one's own followers, the retweet function is symbolized by "RT" in the message.
In late 2009, the "Twitter Lists" feature was added, making it possible for users to follow (as well as mention and reply to) ad-hoc lists of authors instead of individual authors.
[51][59]Through SMS, users can communicate with 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[60] and
Orange[61] networks. In India, since Twitter only supports tweets from
Bharti Airtel, an alternative platform called smsTweet was set up by a user to work on all networks. A similar platform called GladlyCast
[65] exists for mobile phone users in Singapore, Malaysia and the Philippines.
The messages were initially set to a 140-character limit for compatibility with SMS messaging, introducing the shorthand notation and
slang commonly used in SMS messages. The 140-character limit has also increased the usage of
URL shortening services such as
bit.ly, goo.gl, and tr.im, and content-hosting services, such as
Twitpic, memozu.com and
NotePub to accommodate
multimediacontent and text longer than 140 characters. Twitter uses its own t.co domain for automatic shortening of all URLs posted on its website.

Content of Tweets according to Pear Analytics.
[67] News
Spam
Self-promotion
Pointless babble
Conversational
Pass-along value
San Antonio-based market-research firm
Pear Analytics analyzed 2,000 tweets (originating from the US 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:
[67] 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 explains as persons "want[ing] to know what the people around them are thinking and doing and feeling, even when co-presence isn’t viable").
[68]Rankings
Twitter is ranked as one of the ten-most-visited websites worldwide by
Alexa's web traffic analysis.
[69] Daily user estimates vary as the company does not publish statistics on active accounts. A February 2009
Compete.com blog entry ranked Twitter as the third most used social network based on their count of 6 million unique monthly visitors and 55 million monthly visits.
[70] In March 2009, a
Nielsen.com blog ranked Twitter as the fastest-growing website in the Member Communities category for February 2009. Twitter had annual growth of 1,382 percent, increasing from 475,000 unique visitors in February 2008 to 7 million in February 2009. It was followed by
Zimbio with a 240 percent increase, and
Facebook with a 228 percent increase.
[71]Twitter has a user retention rate of forty percent.
[72]Adding and following content
There are numerous tools for adding content, monitoring content and conversations including Twitvid (video sharing),
[73] TweetDeck,
Salesforce.com,
HootSuite, and Twitterfeed. Fewer than half of tweets are posted using the web user interface with most users using third-party applications (based on analysis of 500 million tweets by Sysomos).
[74]Trends
A word, phrase or topic that is tagged at a greater rate than other tags 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 one specific topic.
[75] These topics help Twitter and their users to understand what is happening in the world.
[76]Trending topics are sometimes the result of concerted efforts by fans of certain celebrities or cultural phenomena, particularly
Lady Gaga (known as Monsters),
Justin Bieber (Beliebers) and the
Twilightand
Harry Potter novels. Twitter have altered the trend algorithm in the past to prevent manipulation of this type.
[77]Twitter's March 30, 2010 blog post announced that the hottest Twitter trending topics will scroll across the Twitter homepage.
[78] Users will also be able to find out how a specific topic became a trending topic.
There have been controversy surrounding the Twitter trending topics: Twitter censored
hashtags that their users found offensive. Twitter censored the #Thatsafrican
[79] and the #thingsdarkiessay
[80]hashtags after users complained that they found the hashtags offensive.
Authentication
As of August 31, 2010, third-party Twitter applications are required to use
OAuth, an authentication method that does not require users to enter their password into the authenticating application. Previously, the OAuth authentication method was optional, it is now compulsory and the user-name/password authentication method has been made redundant and is no longer functional. Twitter stated that the move to OAuth will mean "increased security and a better experience."
[81]Demographics
| Twitter.com Top5 Global Markets by Reach (%)[82][83] |
| 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 cafes or access from mobile phones or PDAs. |
Twitter is 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. According to
comScore only eleven percent of Twitter's users are aged twelve to seventeen. comScore attributes 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 as of late, has stated that Twitter has begun to "filter more into the mainstream", and "along with it came a culture of celebrity as
Shaq,
Britney Spears and
Ashton Kutcher joined the ranks of the Twitterati."
[85]According to a study by
Sysomos in June 2009, women make up a slightly larger 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 has the most Twitter users.
[86]According to Quancast, twenty-seven million people in the US used Twitter as of September 3, 2009. Sixty-three percent of Twitter users are under thirty-five years old; sixty percent of Twitter users are Caucasian, but a higher than average (compared to other Internet properties) are African American (sixteen percent) and Hispanic (eleven percent); fifty-eight percent of Twitter users have a total household income of at least $60,000.
[87]On September 7, 2011, Twitter announced that it has 100 million active users logging in at least once a month and 50 million active users every day.
[88]In an article published on January 6th, 2012, Twitter was confirmed to be the biggest social media network in Japan, with Facebook following closely in second. comScore confirmed this, stating that Japan is the only country in the world where Twitter leads Facebook.
[89]Finances
Funding
Twitter raised over US$57 million from
venture capitalist growth funding, although exact numbers are not publicly disclosed. Twitter's first A round of funding was for an undisclosed amount that is rumored to have been between $1 million and $5 million.
[90] Its second B round of funding in 2008 was for $22 million
[91] and its third C round of funding in 2009 was for $35 million from Institutional Venture Partners and
Benchmark Capital along with an undisclosed amount from other investors including Union Square Ventures, Spark Capital and
Insight Venture Partners.
[90] Twitter is backed by
Union Square Ventures, Digital Garage, Spark Capital, and Bezos Expeditions.
[92]In May 2008,
The Industry Standard remarked that Twitter's long-term viability is limited by a lack of revenue.
[93] 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 since it already provides product recommendations and promotions.
[94]The company raised $200 million in new venture capital in December 2010, at a valuation of approximately $3.7 billion.
[95] In March 2011, 35,000 Twitter shares sold for $34.50 each on Sharespost, an implied valuation of $7.8 billion.
[96] In August, 2010 Twitter announced a "significant" investment lead by
Digital Sky Technologies that, at $800 million, was reported to be the largest
venture round in history.
[97]In December 2011, the
Saudi prince
Alwaleed bin Talal invested $300 million in Twitter. The company was valued at $8.4 billion at the time.
[99]Revenue sources
In July 2009, some of Twitter's revenue and user growth documents were published on
TechCrunch after being illegally obtained by
Hacker Croll. The documents projected 2009 revenues of $400,000 in the third quarter and $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 $1.54 billion in revenue, $111 million in net earnings, and 1 billion users. No information about how Twitter planned to achieve those numbers was published. In response, Twitter co-founder Biz Stone published a blog post suggesting the possibility of legal action against the hacker.
[100]On April 13, 2010, 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 website, similar to
Google Adwords' advertising model. As of April 13, Twitter announced it had already signed up a number of companies wishing to advertise including
Sony Pictures,
Red Bull,
Best Buy, and
Starbucks.
[101][102]The company generated $45 million in annual revenue in 2010, after beginning sales midway through that year. The company operated at a loss through most of 2010. Revenues were forecast for $100 million to $110 million in 2011.
[95] Users' photos can generate royalty-free revenue for Twitter, with an agreement with
WENN being announced in May 2011.
[103] In June 2011, Twitter announced that it would offer small businesses a self serve advertising system.
[104]Technology
Implementation
As of April 6, 2011, Twitter engineers confirmed they had switched away from their Ruby on Rails search-stack, to a
Java server they call Blender.
[107]Interface
On April 30, 2009, Twitter adjusted its web interface, adding a search bar and a sidebar of "
trending topics" — the most common phrases appearing in messages.
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."
[112]In March 2012, 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.
[113]Outages
When Twitter experiences an outage, users see the "fail whale"
error message image created by Yiying Lu,
[114] 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."
[115]- May 2008 – Twitter's new engineering team made architectural changes to deal with the scale of growth. Stability issues resulted in down time or temporary feature removal.
- August 2008 – Twitter withdrew free SMS services from users in the United Kingdom[119] and for approximately five months instant messaging support via a XMPP bot was listed as being "temporarily unavailable".[120]
- October 10, 2008 – Twitter's status blog announced that instant messaging (IM) service was no longer a temporary outage and needed to be revamped. It was announced that Twitter aims to return its IM service pending necessary major work.[121]
- June 12, 2009 – In what was called a potential "Twitpocalypse", the unique numerical identifier associated with each tweet exceeded the limit of 32-bit signed integers (2,147,483,647 total messages).[122] While Twitter itself was not affected, some third-party clients could no longer access recent tweets. Patches were quickly released, though some iPhone applications had to wait for approval from the App Store.[123]
- June 25, 2009 – Twitter crashed at least once and ran very slowly for some time after It recorded over 50,000 tweets about Michael Jackson’s death in just one hour.[124] Michael Jackson was ranked on seven of the top ten trending topics.
- August 6, 2009 – Twitter and Facebook suffered from a denial-of-service attack, causing the Twitter website to go offline for several hours.[125] It was later confirmed that the attacks were directed at one pro-Georgian user around the anniversary of the 2008 South Ossetia War, rather than the sites themselves.[126]
- September 22, 2009 – The identifier exceeded the limit for 32-bit unsigned integers (4,294,967,296 total messages) again breaking some third-party clients.[127]
- December 17, 2009 – A hacking attack replaced the website's welcoming screen with an image of a green flag and the caption "This site has been hacked by Iranian Cyber Army" for nearly an hour. No connection between the hackers and Iran has been established.[128]
- June–July 2010 – Twitter had a very high service rejection rate (10–20%) during the 2010 FIFA World Cup period, also, the response latency increased substantially.[129]
- November 2010 – A number of accounts encountered a fault that resulted in them seeing the "fail whale" when they tried to login to their accounts. The accounts themselves were not locked out as account holders could still see their "mentions" page, and post from there, but the timeline and a number of other features were unavailable during this outage.
Privacy and security
Twitter messages are public but users can also send private messages.
[130] Twitter collects
personally identifiable information about its users and shares it with third parties. The service reserves the right to sell this information as an asset if the company changes hands.
[131] While Twitter displays no advertising, advertisers can
target users based on their history of tweets and may quote tweets in ads
[132] directed specifically to the user.
A security vulnerability was reported on April 7, 2007, by Nitesh Dhanjani and Rujith. Since Twitter used the
phone number of the sender of an
SMS message as authentication, malicious users could update someone else's status page by using
SMS spoofing.
[133] 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 introduced an optional
personal identification number (PIN) that its users could use to authenticate their SMS-originating messages.
[134]On January 5, 2009, 33 high-profile Twitter accounts were compromised after a Twitter administrator's password was guessed by a
dictionary attack.
[135] Falsified tweets — including sexually explicit and drug-related messages — were sent from these accounts.
[136]Twitter launched the
beta version of their "Verified Accounts" service on June 11, 2009, allowing famous or notable people to announce their Twitter account name. The home pages of these accounts display a badge indicating their status.
[137]In May 2010, a bug was discovered by
İnci Sözlük, involving users that allowed Twitter users 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.
[138]In response to Twitter's security breaches, the
Federal Trade Commission brought charges against the service which 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 to take a number of steps to secure users' private information, including maintenance of a "comprehensive information security program" to be independently audited biannually.
[139]On December 14, 2010, the
United States Department of Justice issued a
subpoena directing Twitter to provide information for accounts registered to or associated with
WikiLeaks.
[140] 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".
[130]A "MouseOver" exploit occurred on September 21, 2010, when an
XSS Worm became active on Twitter. When an account
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.
[141] The exploit was then re-used to post
pop-up ads and links to pornographic sites. The origin is unclear but Pearce H. Delphin (known on Twitter as @zzap) and a Scandinavian developer, Magnus Holm, both claim to have modified the exploit of a user, possibly Masato Kinugawa, who was using it to create coloured Tweets.
[142] Kinugawa, a Japanese developer, reported the XSS vulnerability to Twitter on August 14. Later, when he found it was exploitable again, he created the account 'RainbowTwtr' and used it to post coloured messages.
[142] Delphin says he exposed the security flaw by tweeting a JavaScript function for "onMouseOver",
[142] and Holm later created and posted the
XSS Worm that automatically re-tweeted itself.
[141] 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.
[141] Twitter issued a statement on their status blog at 13:50 UTC that "
The exploit is fully patched".
[141][143] Twitter representative Carolyn Penner said no charges would be pressed.
[144]In May 2011, a
claimant known as "CTB" (subsequently identified as
Ryan Giggs) in the case of
CTB v Twitter Inc., Persons Unknown took legal action at the
High Court of Justice in London against Twitter.,
[145] requesting that Twitter release details of account holders. This followed
gossip posted on Twitter about Giggs' private life, causing conflict relating to
privacy injunctions.
[146][147] Tony Wang, the head of 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.
[148] He also suggested that Twitter would accede to a UK court order to divulge names of users responsible for "illegal activity" on the site.
[149]On May 29, 2011, it was reported that
South Tyneside council in England had successfully taken legal action against Twitter in a court in California, which forced Twitter to reveal the details of five user accounts. The council was trying to discover the identity of a
blogger called "Mr Monkey"
[150] who allegedly posted
libellous statements about three local councillors.
On January 23, 2012, it was reported that Twitter will be acquiring
Dasient, a startup that offers malware protection for businesses. Twitter hopes that Dasient will help remove hateful advertisers on the website.
[152]On January 26, 2012, Twitter began offering a feature which would allow tweets to be removed selectively by country. Twitter cited France and Germany as examples, where pro-
Nazi content is illegal. Previously, deleted tweets were removed in all countries.
[153][154]Open source
Twitter released several
open source projects developed while overcoming technical challenges of their service.
[157] Notable projects are the
Gizzard Scala framework for creating distributed datastores and the distributed graph database
FlockDB.
URL shortener
t.co is a
URL shortening service created by Twitter. It is only available for links posted to Twitter and not available for general use. All links posted to Twitter use a t.co wrapper. Twitter hopes that the service will be able to protect users from malicious sites, and will use it to track clicks on links within tweets.
[159]Having previously used the services of third parties
TinyURL and
bit.ly,
[160] Twitter began experimenting with its own URL shortening service for direct messages in March 2010 using the twt.tl domain, before it purchased the t.co domain. The service was tested on the main site using the accounts @TwitterAPI, @rsarver and @raffi. On September 2, 2010, an email from 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.
[161]Integrated photo-sharing service
On June 1, 2011, 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.
[162] Users now also have the ability to add pictures to Twitter's search by adding hashtags to the tweet.
[163] Twitter also plans to provide photo galleries designed to gather and syndicate all photos that a user has uploaded on Twitter and third-party services such as TwitPic.
[163]Use and social impact

Dorsey (left) said after a Twitter Town Hall held in July 2011, that Twitter received over 110,000 #Ask
Obama tweets.
[164]Main article:
Twitter usageTwitter 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 Revolutions", which include the
2011 Egyptian revolution,
2010–2011 Tunisian protests,
2009–2010 Iranian election protests, and
2009 Moldova civil unrest.
[165] The governments of Iran and Egypt blocked the service in retaliation.
[166][167] The service is also used as a form of
civil disobedience: in 2010, users expressed outrage over the
Twitter Joke Trial by making obvious jokes about terrorism; and in the
British privacy injunction debate in the same country a year later, where several celebrities who had taken out anonymised injunctions, most notably the
Manchester United player
Ryan Giggs, were identified by thousands of users in protest to traditional journalism being censored.
[169]Twitter is also increasingly used for making TV more interactive and social.
[170] This effect is sometimes referred to as the "virtual watercooler" or
social television — the practice has been called "chatterboxing".
[171] Twitter has been successfully used to encourage people to watch live TV events, such as the
Oscars, the
Super Bowl[172] and the
MTV Video Music Awards; however this strategy has proven less effective with regularly scheduled TV shows.
[173] Such direct cross-promotions have been banned from French television due to regulations against secret advertising.
[174]In May 2008,
The Wall Street Journal wrote that
social networking services such as 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."
[175]Tech writer
Bruce Sterling opined in 2007 that using Twitter for "literate communication" is "about as likely as firing up a
CB radio and hearing some guy recite the
Iliad".
[176] In September 2008, the journalist
Clive Thompson mused in a
The 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."
[177] Conversely,
Vancouver Sun columnist
Steve Dotto opined that part of Twitter's appeal is the challenge of trying to publish such messages in tight constraints,
[178] and
Jonathan Zittrain, professor of Internet law at
Harvard Law School, said that "the qualities that make Twitter seem inane and half-baked are what makes it so powerful".
[179]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 responded by stating that it does not censor hashtags unless they contain obscenities.
[185][186][187]Reception
In 2006, when Twitter launched under the name "Twttr",
Michael Arrington of
TechCrunch commented that although he liked the service, he also noted that he felt uncomfortable with the fact that every user's Twitter page is available to the public.
[188]Change of focus

The
mobile version of twitter.com
Twitter emphasized its news and information-network strategy in November 2009 by changing the question asked to users for status updates from "What are you doing?" to "What's happening?"
[189][190] Entertainment Weekly put it on its end-of-the-decade, "best-of" list, saying, "Limiting yourself to 140 characters—the maximum for messages on this diabolically addictive social-networking tool—is easy."
[191]On November 22, 2010,
Biz Stone, a cofounder of the company, expressed for the first time the idea of a
Twitter news network,
[192] a concept of a wire-like news service he has been working on for years.
[193]