He may be the world's richest man but Bill Gates is just as dedicated to giving money where it's needed (Live 8 - Make Poverty History) as he is to making it for himself and his company, software giant Microsoft. He began the business back in the late seventies with a friend from university, Paul Allen, and launched it's first operating system, Windows. The rest, as they say, is history. Windows grew and grew, updating every few years to it's most recent incarnation, Windows 7, in 2009. Microsoft has now branched out into video gaming, releasing the X-Box and X-Box 360 to compete with Sony's Playstation and Nintendo's Game Cube.