It was seven years ago today that Twitter co-founder Jack Dorsey sent Tweet #1.
Here’s a video that Twitter is making available to mark their birthday.
See Also: Images from the Early Days of Twitter
See Also: “Five Years Later, Jack Dorsey Tweets About Twitter’s Beginnings” (via PC Week; March 14, 2013)
See Also: On Its 7th Birthday, Is Twitter Still The ‘Free Speech Party’? (via NPR)