... 20s Bill Gates dropped out of Harvard and decided to start his own software company with friend and co-founder of Microsoft, Paul Allen . Microsoft's official history says that in 1975, when Gates was just 20 years old he and friend Paul Allen were ...
http://www.sfgate.com/technology/businessinsider/article/What-8-Tech-Billionaires-Were-Doing-In-Their-20s-4432336.php
http://www.sfgate.com/technology/businessinsider/article/What-8-Tech-Billionaires-Were-Doing-In-Their-20s-4432336.php
