Twitter

www.twitter.com 

Twitter was founded by Jack Dorsey, Noah Glass, Even Williams and Biz Stone, in March 2006. Twitters headquarters are in San Francisco, United States.
 Twitter started when Dorsey, Glass and Williams came together and invented 'twttr', inspired by flickr. They began to work on this project on March 21, 2006, when Dorsey posted the first Twitter message at 9:50 PM "just setting up my twttr".
  "...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.
The full version of Twitter was published on July 15th 2006. Twitter became its own company in April 2007.

 On Twitter you posted messages onto your own page, which can be seen by your 'followers' on the Homepage. Followers are the people or your friends who follow you on twitter. Twitter is mostly used to update your status. Twitter is also used for education reasons. Students can all go on at the same time and chat to each other about study, homework or other education related topics. Its easy to chat to you peers on Twitter you can just use the hash tag key (#) and it will show you everyone using that word, phrase or sentence.

Twitter is used by many famous people such as Lady GaGa, Justin Bieber and Katy Perry, even Barack Obama uses twitter. They tell people about tour dates, new albums and quotes from American President, Barack Obama.
  Twitters Logo is know all around the world. The Logo for Twitter has changed over the years.

                                

The first logo, used               The second logo, used              The third and current

from July 15, 2006                from September 14,                  logo, used since June 5

until September 14,               2010 until 5 June 2012.            2012.

2010. 

 Twitter had a massive increase in growth in 2010. In February 2012, Twitter users were sending 50 million tweets per day. In June 2012, around 65 million tweets were posted each day, which is about 750 tweets sent each second, according to Twitter 

  On February 21, 2012, it was announced that Twitter and Yandex, a Russian search engine, agreed to a partnership.
  On March 21, 2012, Twitter celebrated its sixth birthday and also announcing that it has 140 million users and has 340 million tweets per day.

Picture source:
http://en.wikipedia.org/wiki/Twitter#Logo
                                                        
Information:  http://en.wikipedia.org/wiki/Twitter