Some guys spend their college days chasing women and drinking suds.......

Other guys spend their college days starting companies and becoming billionaires.

According to, here's a rundown of some successful businesses that were started in college:

Google -- Sergey Brin and Larry Page were at Stanford University when they first started a search engine called "Back Rub" around 1996.

Facebook -- Mark Zuckerberg created Facebook while in his dorm room at Harvard in 2004. He is now the world's youngest billionaire.

Time magazine -- Time was created by two seniors at Yale in 1923.

Microsoft -- Bill Gates dropped out of Harvard to pursue the business plans for Microsoft.

FedEx -- Frederick W. Smith wrote the business plan for FedEx while in grad school in the 1970s. Legend has it, Smith received a "C" grade for the paper.

Dell Computers -- Michael Dell began his company at the University of Texas with only $1,000. He dropped out of college after the company took off quickly.