Industrialist, computer programmer, philanthropist, and inventor who Forbes ranked as the wealthiest person overall from 1995 to 2009.
He hacked into his high school's computer system to make sure there would be more girls in his classes than boys.
He attended Lakeside School, whose Mothers Club used garage sale proceeds to buy a Teletype Model 33 ASR computer. This was the computer he learned to program on.
He married Melinda Gates on January 1, 1994.
His work is often compared to that of Steven Jobs, who was a fierce competitor of his during the computer revolution.