What These 8 Tech Billionaires Were Up To In Their 20s


#7 Mark Zuckerberg Was A Billionaire By 23!

Mark Elliot Zuckerberg, a Harvard drop out, who co-founded Facebook was already a billionaire at the age of 23. Zuckerberg attended Harvard College, majoring in computer science and psychology. In his second year at college, he wrote a notorious application that he called Facemash that allowed students on the college's network to vote on the relative attractiveness of other students. It was shut down within days, and led to disciplinary action.

Together with his college roommates and fellow Harvard University students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes they launched Facebook from their dormitory room. They took Facebook to other campuses nationwide and soon after moved to Palo Alto, California. By 2007, Facebook had made him a billionaire at the age of 23. By 2010, Facebook had an estimated 500 million users worldwide and reached 1 billion in 2012. Zuckerberg was involved in various legal disputes initiated by others who claimed a share of the company due to their help in setting it up.

Since 2010, Zuckerberg has been named among the 100 wealthiest and most influential people in the world by Time magazine's Person of the Year.

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