In pics: Top 10 billionaire tech CEOs

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Larry Page
Larry Page will join an exclusive group of technology CEOs - who also happen to be billionaires - when he takes over the top role at Google in April.

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Mark Zuckerberg
Facebook CEO Mark Zuckerberg. Age 26. Zuckerberg founded social networking site Facebook in February 2004 from his Harvard dorm room. He left school for Silicon Valley that year. Zuckerberg is the youngest billionaire on earth and possibly the youngest self-made billionaire ever.

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Steve Ballmer
Microsoft CEO Steve Ballmer. Age 54. Ballmer is arguably the world's hardest-working and most animated billionaire. The Microsoft chief executive is a salesman extraordinaire who will go to any length to sell a product - and in the process, often makes a complete fool of himself. In spite of his bombastic displays, Ballmer is nobody's fool: he leads the world's biggest software company, and Forbes estimates his personal net worth at $ 15 billion.

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Robin Li
Baidu.com CEO Robin Li. Age 42. The Chinese Internet entrepreneur heads China's online search leader, Baidu. Before co-founding Baidu in 2000, Li worked as a staff engineer in Silicon Valley for Infoseek, a pioneer in the Internet search engine industry. Li sits on board of New York-listed New Oriental Education & Technology, which provides educational services in China. Wealth estimate includes shares held by wife, Melissa Ma.

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Jeff Bezos
Amazon.com CEO Jeff Bezos. Age 47. Raised in Texas and Florida, became computer whiz at Princeton. Bezos worked at hedge funds on Wall Street after graduation. Quit before his 30th birthday to sell books on the Internet from Seattle garage with his wife. Took Amazon.com public in 1997; company name derived from South American river's unending tributaries. Survived dot-com bust with discount pricing and free shipping.