About FaceBook

This article is about the social networking service. For the type of directory, see face book.

Facebook, Inc.

Facebook login/signup screen
Type	Public
Traded as	NASDAQ: FB NASDAQ-100 Component S&P 500 Component
Founded	February 4, 2004; 12 years ago
Headquarters	Menlo Park, California, U.S.
Coordinates	37.4848°N 122.1484°WCoordinates: 37.4848°N 122.1484°W
Area served	United States (2004–05) Worldwide, except blocking countries (2005–present)
Founder(s)	Mark Zuckerberg Eduardo Saverin Andrew McCollum Dustin Moskovitz Chris Hughes
Key people	Mark Zuckerberg (Chairman and CEO) Sheryl Sandberg (COO)
Industry	Internet
Revenue	US$17.928 billion (2015)[1]
Operating income	US$6.225 billion (2015)[1]
Net income	US$3.688 billion (2015)[1]
Total assets	US$49.407 billion (2015)[1]
Total equity	US$44.218 billion (2015)[1]
Owner	Mark Zuckerberg (53%)
Employees	12,691 (2015)[2]
Subsidiaries	Instagram WhatsApp Oculus VR PrivateCore
Website	www.facebook.com or www.fb.com
Written in	C++, PHP (as HHVM)[3] and D language[4]
Alexa rank	3 (May 2016)[5]
Type of site	Social networking service
Registration	Required
Users	1.65 billion monthly active users (March 31, 2016)[6]
Available in	Multilingual (140)
Current status	Active

Facebook (stylized as facebook) is a for-profit corporation and online social networking service based in Menlo Park, California, United States. Its website was launched on February 4, 2004 by Mark Zuckerberg with his Harvard College roommates and fellow students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes.^[7][8][9] The founders had initially limited the website's membership to Harvard students, but later expanded it to higher education institutions in the Boston area, the Ivy League, and Stanford University. It gradually added support for students at various other universities and later to high school students. Since 2006, anyone in general aged 13 and older has been allowed to become a registered user of the website, though variations exist in the minimum age requirement, depending on applicable local laws.^[10] Its name comes from the face book directories often given to U.S. university students.^[11]
After registering to use the site, users can create a user profile, add other users as "friends", exchange messages, post status updates and photos, share videos, use various apps, and receive notifications when others update their profiles. Additionally, users may join common-interest user groups organized by workplace, school, or other characteristics, and categorize their friends into lists such as "People From Work" or "Close Friends". In groups editors can pin posts to top. Also, users can complain about or block unpleasant people. Because of the large volume of data that users submit to the service, Facebook has come under scrutiny for their privacy policies. Facebook, Inc. held its initial public offering in February 2012 and began selling stock to the public three months later, reaching an original peak market capitalization of $104 billion. On July 13, 2015, it became the fastest company in the Standard & Poor's 500 Index to reach a market cap of $250 billion.^[12] Facebook has more than 1.65 billion monthly active users as of March 31, 2016.

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