Twitter Birthday: Twitter turns 6!

FRESNO, Calif.

Twitter's co-founder Jack Dorsey sent the first-ever tweet, on March 21st, 2006 at 3:50 pm. It said, "just setting up my twttr".

Since then, millions have set up accounts, using the site to share information with their followers, and friends.

Wednesday, "Happy Birthday Twitter' is a trending topic -- with users all around the world giving their praise for the site, all using less than 140 characters, of course.

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