Bill Gates at Harvard

Microsoft founder Bill Gates can finally tell his dad he has a college degree. Gates dropped out of Harvard in 1975 to devote himself to his software company, Microsoft, eventually becoming the world's richest man. Now he's spending his billions through his foundation to fight disease in developing nations.

Bill Gates received an honorary diploma before speaking at Harvard's commencement Thursday afternoon. He told new graduates to use their education along with technology to change the world.