Jack Dorsey days, Dorsey worked occasionally as a fashion model. By age fourteen, Dorsey had become interested in dispatch routing. Some of the open-source software he created in the area of dispatch logistics is still used by many taxi cab companies. Dorsey attended the University of Missouri–Rolla for two-plus years (1995–1997) before transferring to New York University, but he dropped out in 1999, one semester short of graduating. He first came up with the idea that he developed as Twitter while studying at New York University. While working on dispatching as a programmer, Dorsey moved to California. In 2000, Dorsey started his
Tommy Dorsey Clambake Seven as a Dixieland group that played during performances, too. The Dorsey band had a national radio presence in 1936, first from Dallas and then from Los Angeles. Tommy Dorsey and his Orchestra took over comedian Jack Pearl's radio show in 1937. By 1939, Dorsey was aware of criticism that his band lacked a jazz feeling. He hired arranger Sy Oliver away from the Jimmie Lunceford band. Sy Oliver's arrangements include "On The Sunny Side of the Street" and "T.D.'s Boogie Woogie"; Oliver also composed two of the new band's signature instrumentals, "Well, Git It" and "Opus One". In