William Henry "Bill" Gates III(born October 28, 1955) is an American business magnate, philanthropist, and chairman of Microsoft, the software company he founded with Paul Allen. He is consistently ranked among the world's wealthiest people and the wealthiest overall from 1995 to 2010, excluding 2007. During his career at Microsoft, Gates held the positions of CEO and chief software architect, and remains the largest individual shareholder with more than 8 percent of the common stock.
For other uses, see Billionaire (disambiguation). In countries that use the short scale number naming system, a billionaire is a person who has a net worth of at least one billion units of a currency, usually the US Dollar, Euro or the Pound Sterling. Forbes Magazine updates a complete list of US Dollar billionaires around the world every year. There were 793 officially known short scale billionaires in the world as of 2009.