Bill Gates' initial major at Harvard was mathematics when he enrolled in 1973, but he did not have a definite academic plan in mind and left Harvard to pursue starting a software company. He co-founded Microsoft with Paul Allen.
Gates had primary responsibility for Microsoft product design from its founding in 1975 to 2006 when he no longer worked full-time. He was the CEO of Microsoft until 2000. He is one of the world's wealthiest people and was the wealthiest person from 1995 until 2009, excluding 2008. Gates had an estimated net worth of $79.2 billion in 2014. He was born in Seattle, WA.