Steven Anthony Ballmer (born March 24, 1956) is the Chief Executive Officer of Microsoft since January 2000.
Ballmer is a enthusiastic person and has been famous for his speaches where he several times screames and shoutes. His vocal cords required surgery after he screamed "Windows, Windows, Windows" continuously at a Japan meeting in 1991. On another developers conference Ballmer repeatedly chanted "developers" at least 14 times.
$12.1 billion as of 2005.
How Steve Ballmer got rich
Ballmer is the first person ever to become a billionaire by stock options received by being an employee of a company of which neither he nor a relative was the founder.