On This Day in Tech History

The world's first tweet was sent by Twitter co-founder Jack Dorsey on March 21, 2006. The tweet, which read "just setting up my twttr," was a simple message announcing the creation of a new social media platform. At the time, Twitter was a side project of Odeo, a podcasting company where Dorsey was working as a programmer. The tweet was posted to a small group of followers, mainly consisting of other Odeo employees. Over time, Twitter grew in popularity and became one of the most influential and widely-used social media platforms in the world, with billions of tweets sent every day.