9. Sergey Brin
Sergey Brin is one of the creators of Google, the world's most popular search engine, with Larry Page. The two still manage the company and are billionaires.
Sergey Brin was born on August 21, 1973, in Moscow, Russia. His family immigrated to the United States to escape Jewish persecution in 1979. He met Larry Page at Stanford University, and the two created a search engine that would sort web pages based on popularity. They named the search engine "Google," based on the mathematical term "googol." Since it's launch in 1998, Google has become the most popular search engine in the world.
In March 2013, Brin was ranked No. 21 on Forbes' 2013 "Billionaires" list.