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Creation of Facebook
Mark Zuckerberg and co-founders Dustin Moskovitz, Chris Hughes and Eduardo Saverin launch Facebook from their Harvard dorm room -
One million users
Facebook reaches nearly 1 million active users -
Five times as many users
Facebook reaches more than 5.5 million active users -
Mobile market
Facebook reaches over 50 million active users
Facebook launches Facebook Platform for Mobile
Facebook and Microsoft expand advertising deal to cover international markets; Microsoft takes a $240 million equity stake in Facebook -
100 million
Facebook reaches over 100 million active users -
500 million
Facebook reaches over 500 million active users