Facebook

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This article is about the website. See Facebook, Inc. for the company that operates it. For the type of photographic directory, see face book.

Facebook

Screenshot [show]
URL facebook.com
Type of site Social networking service
Registration Required
Available language(s) Multilingual (70)
Users 1 billion[1] (active October 2012)
Written in C++ and PHP[2]
Owner Facebook, Inc.
Created by
Mark Zuckerberg
Eduardo Saverin
Andrew McCollum
Dustin Moskovitz
Chris Hughes
Launched February 4, 2004
Revenue $ 3.71 billion (2011)[3]
Alexa rank 1 (January 2013)[4]
Current status Active
Facebook is a social networking service launched in February 2004, owned and operated by Facebook, Inc.[5] As of September 2012, Facebook has over one billion active users,[6] more than half of them using Facebook on a mobile device.[7] Users must register before using the site, after which they may create a personal profile, add other users as friends, and exchange messages, including automatic notifications when they update their profile. Additionally, users may join common-interest user groups, organized by workplace, school or college, or other characteristics, and categorize their friends into lists such as "People From Work" or "Close Friends".
Facebook was founded by Mark Zuckerberg with his college roommates and fellow Harvard University students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes.[8] The website 's membership was initially limited by the founders to Harvard students, but was expanded to other colleges in the Boston area, the Ivy League, and Stanford University. It gradually added support for students at various other universities before opening to high school students, and eventually to anyone aged 13 and over.
In May 2005, Accel partners invested $12.7 million in Facebook, and Jim Breyer[9] added $1 million of his own money to the pot.
According to a May 2011 Consumer Reports survey, there

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