Happy Birthday Twitter

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Twitter was five years old yesterday, in that on 21st March 2006, founder Jack Dorsey (@jack) sent the first Tweet.

It read “just setting up my twttr” (twttr being the original name for the microblogging website).

In the five years since, more than 200m users have registered accounts (including people and bots) and the company, with just 400 employees, is worth in excess of $8bn. And it’s growing at an astonishing rate, with around 500,000 new users registered every day and around 140m tweets sent every day, which is almost three times more than at this time last year.

Twitter has celebrated with a celebrity-packed birthday video: