Striking it rich in tech – In perhaps the most famous entrepreneur story of the 21st century, Mark Zuckerberg and several classmates founded Facebook from a Harvard dorm room in 2004. Facebook now has more than 1 billion users worldwide, and Zuckerberg himself is worth about $30 billion, making him one of the world's richest men.
Striking it rich in tech – A number of entrepreneurs have parlayed tiny tech startups into millions, or even billions. The latest to hit the jackpot: WhatsApp founders Brian Acton, left, and Jan Koum, who sold their mobile messaging service to Facebook for $19 billion in cash and stock.
Striking it rich in tech – Jack Dorsey, Evan Williams and Biz Stone, left to right, started Twitter in 2006. The fast-growing company went public last year and is now worth more than $30 billion, making them all very wealthy.
Striking it rich in tech – David Karp founded Tumblr, the blogging platform, in 2007 when he was 20 years old. Last year it was bought by Yahoo for $1.1 billion.
Striking it rich in tech – Aaron Levie launched Box, his cloud-computing company, from his college dorm room in 2005. It now has more than 20 million users, and Levie has said Box will likely go public in 2014.
Striking it rich in tech – Sergey Brin, left, and Larry Page founded Google in 1998 while graduate students at Stanford. The massive tech company went public in 2004, making them both billionaires.
Striking it rich in tech – Reid Hastings, a former Peace Corps volunteer in Africa, founded Netflix in 1998. The company pioneered the use of DVD rentals through the mail and is now a leader in streaming video, with more than 40 million subscribers.
Striking it rich in tech – Kevin Systrom founded Instagram, the photo-sharing network, with Mike Krieger in 2010. In 2012, Facebook snapped it up for more than $700 million.
Striking it rich in tech – Andrew Mason founded daily-deals site Groupon in 2008, turned down a reported $6 billion acquisition offer from Google and later took the company public. But he was fired as CEO of his company in early 2013 after Groupon began struggling.