Jack Dorsey

Software engineer Jack Dorsey is the Co-Founder of Twitter, and was the CEO until October 2008. Dorsey had the original idea for Twitter while still at Odeo, a podcasting startup which was a project of Obvious Corp. He is now the chairman of Twitter.

In May 2009, Dorsey announced his latest startup, Square. Square, originally code-named Squirrel, is a mobile payment startup with both an app and a piece of hardware that allows the iPhone and Android to accept credit card payments.

Dorsey was a student at University of Missouri - Rolla, later New York University, which he dropped out of and left his job as a programmer at a bike courier dispatch service in 1999 to move to San Francisco.
 

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