Happy 6th Birthday Twitter!

Six years ago today, the first ever tweet was sent by Twitter co-founder Jack Dorsey. And today, there are over 500 million registered users sending more than a billion tweets a week. You’ve come a long way, baby!

The tweet below contains the first, fateful words ever typed into Twitter. Dorsey was with fellow co-founders Biz Stone and Evan Williams tweeting to each other and a small group of family friends during those first few weeks, getting the service up and running.

Six years ago, Twitter (which was known as Twttr back then) was meant to be a mobile phone-based service, which is why each tweet is only 140 characters, plus 20 characters for the username of the sender – 160 is the length of a SMS or text message.

A year after its creation, Twitter went on to win in...

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