The social media platform got off the ground five years ago this month, with this momentous tweet from co-founder Jack Dorsey:
The Twitter logo.
Jack is reminiscing - via Twitter - about the explosive growth of his company.
At 5:33PM 5 years ago today, we had design, login, & update. There were only 2 people on twttr, me & @florian.
You can find more info on Twitter's blog. PC World examines some of its statistics, including this: there are one billion tweets issued per week. The Times of India has more fun with items like this: Lady Gaga has the most followers.