Billionaire Bill is an American business magnate, investor, author, philanthropist, and humanitarian. He is best known as the co-founder of Microsoft Corporation. His full name is William Henry GATES III, but he is commonly referred to as Bill GATES. He is one of the wealthiest people in the world, with a net worth of over $100 billion. GATES has been consistently ranked among the world's wealthiest people since the mid-1990s.