4. Bill Gates: The Man behind Microsoft

Bill Gates is an American inventor, computer programmer, , and businessman, who was born in Seattle, Washington. is reportedly worth nearly $80 billion, making him of the wealthiest people in the country. He , and was head of Microsoft Corporation for years, is still on the board for the computer giant.

Gates was born to an upper-middle class . His father was an attorney; his mother was banker, who worked for the United Way for years. He is credited for being the father the modern computer, and for almost single-handedly starting personal computer revolution. He studied at Harvard University, did not graduate because of his desire to new software.

As a 13-year-old student at the School, which was an exclusive college preparatory school, was introduced to computer programming. That year he a program that allowed users to play tic-tac-toe the computer. Gates was reportedly fascinated by the 's ability to reproduce software code. In 1975, Gates a company called Micro Instrumentation and Telemetry Systems (). He convinced the owner that he had written program that would work with his platform. The of the company bought into Gates innovations, and two men reached an agreement to develop software MITS. The Microsoft Company was born.

Gates went to develop the Windows operating system with then IBM Corporation. The two companies had differences though, their partnership ended quickly. Gates left Microsoft in , but remains on its board of directors. He active with the company for several years before down in February 2014, becoming Technical Advisor for firm.