[tweet https://twitter.com/#!/jack/status/180249972665618432]
Followers: 1.9 million
Jack Dorsey is the executive chairman of Twitter, a company that he co-founded with Evan Williams and Biz Stone in 2006, but it’s Dorsey’s mobile payment device Square that is occupying his tweets lately. As mobile continues to grow, you’ll might want to know more about this conversation. Dorsey’s feed’s not a bad place to start.
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