Twitter is a real-time online social networking platform founded in 2006. As of 2012 it reported over 500 million active users generating over 340 million tweets daily, making it one of the world's most visited websites. 

Quotes of the week

Welcome to Twitter. I've left you a Happy New Year message on my voicemail

British politician John Prescott's tweet to Rupert Murdoch, whose newspapers are in the midst of a row over hacking of voicemail