Bill Gates with a net worth of over US $ 58 billion is one of the world's richest men and also a No. 1 philanthropist. His first business was Traff-O-Data, a company, which created machines that recorded a number of cars passing a given point on a road, and later founded the Microsoft company. Warren Buffet with a net worth of over US $ 62 billion is ranked # 1 of the world’s richest men’s list in 2008, is a paper delivery boy, turned entrepreneur, turned investor.