Almost seven years ago, in February 2004, when Zuckerberg was a 19-year-old sophomore at Harvard, he started a Web service from his dorm. It was called Thefacebook.com, and it was billed as "an online directory that connects people through social networks at colleges."
This year, Facebook — now minus the the — added its 550 millionth member. One out of every dozen people on the planet has a Facebook account. They speak 75 languages and collectively lavish more than 700 billion minutes on Facebook every month. Last month the site accounted for 1 out of 4 American page views. Its membership is currently growing at a rate of about 700,000 people a day.
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