Twitter is a social networking and microblogging service that enables its users to send and read messages known astweets. Tweets are text-based posts of up to 140 characters displayed on the author's profile page and delivered to the author's subscribers who are known as followers. Senders can restrict delivery to those in their circle of friends or, by default, allow open access. Since late 2009, users can follow lists of authors instead of following individual authors.[4][5]All users can send and receive tweets via the Twitter website, Short Message Service (SMS), or external applications (notably including those developed for smartphones). While the service itself costs nothing to use, accessing it through SMS may incur phone service provider fees. The website currently has more than 100 million users worldwide.[6]
Since its creation in 2006 by Jack Dorsey, Twitter has gained notability and popularity worldwide. It is sometimes described as "SMS of the Internet."[7] The use of Twitter's application programming interface for sending and receivingtext messages by other applications often eclipses direct use of Twitter.
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| Type | Private |
|---|---|
| Founded | San Francisco, California, USA |
| Founder | Jack Dorsey Evan Williams Biz Stone |
| Headquarters | San Bruno, California,United States |
| Area served | Worldwide |
| Key people | Jack Dorsey (Chairman) Evan Williams (CEO) Biz Stone (Creative Director) |
| Revenue | ▲ $400,000 Q3 (2009) (projected)[1] |
| Employees | 141[2] |
| Website | www.twitter.com |
| Alexa rank | ▲ 11 (May 2010)[3] |
| Type of site | mobile social network service,microblogging |
| Registration | Required |
| Available in | Multilingual English, Spanish, Japanese, German, French and Italian |
| Launched | 2006 |
| Current status | Active |
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