Mark Elliot Zuckerberg is an American computer programmer and Internet entrepreneur. He is best known for co-creating the social networking site Facebook, of which he is chief executive and president. It was co-founded as a private company in 2004 by Zuckerberg and classmates Dustin Moskovitz, Eduardo Saverin, and Chris Hughes while they were students at Harvard University.  In 2010, Zuckerberg was named Time magazine’s Person of the Year. As of 2011, his personal wealth was estimated to be $17.5 billion.