Mark Zuckerberg, the founder of Facebook has become the word’s youngest billionaire at age 23 according to a Forbes estimate. Mark developed Facebook together with his college friends Eduardo Saverin, Dustin Moskovitz and Chris Hughes. Mark Zuckerberg was chosen as Person of the Year by Time magazine in 2010.

Facebook currently has more than 600 millions users from around the world making it the biggest social networking sites to date.

References:

http://www.usatoday.com

http://www.forbes.com