Michael Saul Dell (1965-) joined the University of Texas at Austin with the intention of becoming a physician. While studying there, he started a computer company in his dormitory, calling it PC's Limited. By the time he turned 19, it had notched up enough success to prompt Dell to dropout.

In 1987, PC's Limited changed its name to Dell Computer Corporation. By 2003, Dell, Inc. was the world's most profitable PC manufacturer.

Dell has won more than his fair share of accolades, including Man of the Year from PC Magazine and EM>CEO of the Year from Financial World. Forbes, in 2005, lists him as the 18th richest in the world with a net worth of around $16 billion. Not bad for just another dropout.

DON'T MISS: Billionaire College Dropouts! - Part II