In Pictures: Tech's 10 most famous college dropout...
10. Twitter: Jack Dorsey
Jack Dorsey transferred to New York University from the Missouri University of Science and Technology, but later dropped out and moved to California. There, Dorsey bounced between jobs before founding Twitter in 2008 alongside Biz Stone and Evan Williams.
Today, Dorsey is chairman of Twitter and CEO of mobile payments company Square. His estimated worth is $650 million, according to Forbes.
In Pictures: Tech's 10 most famous college dropouts