Happy Birthday Twitter!
Sunday, March 21st (a few hours from now on the West Coast) marks Twitter’s 4th birthday — exactly four years since Twitter co-founder Jack Dorsey sent his first Tweet and, along with Evan Williams and Biz Stone , started a phenomenon. Last month, Twitter hit 50 million Tweets per day , and last summer it was announced that “Twitter” would enter the Collins English Dictionary . What birthday message do you have for Twitter? Let us know in the comments.
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