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This 2010, Bill Gates doesn't missed to be out on the topmost list of Forbes 400 list of richest U.S. tycoons in their corresponding fields, from software manufacturing, computer hardware, and to the shining real estate businesses owners. The Microsoft founder remains on the top followed by the Oracle Larry Ellison who are both working for a pretty similar type of company.

The highlights of this year Forbes 400 list is Mark Zuckerberg of Facebook who earned a lot of credit due to his fast growing social networking site. While ago, people are getting curious about him especially with his girlfriend Chan. But of course, it's not the inner matter on the list instead, his leap is quite amazing compared to those rich people from the other industry.