Here are some Bill Gates fun facts from The Encyclopedia of Trivia
William Henry Gates III became a billionaire (US dollars) at the age 31.
Gates stepped down as chief executive officer of Microsoft in January 2000. He remained as chairman and created the position of chief software architect for himself.
In June 2006, Gates announced that he would be changing from full-time work at Microsoft to part-time work, Instead he would be devoting most of his time to the Bill & Melinda Gates Foundation. His last full-time day at Microsoft was June 27, 2008.
Bill Gates' 66,000-square-foot estate in Medina, Washington is nicknamed "Xanadu 2.0." The huge property has a private beach, a 60-foot pool with an underwater sound system and a trampoline room.
He has been the richest man in the world consistently every year since 1998—excluding a few brief periods post-2008.
Bill Gates' personal wealth exceeds that of some third-world countries.