Title: Chairman and co-creator, Twitter; CEO, Square
Born: November 19, 1976, St. Louis, Missouri
Education: New York University (dropped out)
Early Marker: Created open-source logistics software for taxi dispatch.
Big Idea: Microblogging and messaging in 140 characters; now working on platform for small businesses to accept card payments on a mobile device.
Wave of the Future: M-economy, App-economy, social media