Today marks 10 years since the first tweet on Twitter.
Twitter officially began on this date in 2006 when co-founder Jack Dorsey tweeted, "just setting up my twttr." (Back then, it was spelled twttr.)
just setting up my twttr
— Jack (@jack) March 21, 2006
The website's spelling changed about a year later, when Twitter's official account sent its first tweet.
NY1 posted its first tweet on June 3, 2009 (back then, it was under the Twitter handle @ny1headlines).
City Confirms Two More H1N1-Related Deaths http://tinyurl.com/ohwbg8
— NY1 News (@NY1) June 3, 2009
Twitter now boasts over 320 million active users a month.
Some of the most popular users include President Barack Obama, Pope Francis and Katy Perry.