Facebook is an American for-profit corporation and an online social media and social networking service based in Menlo Park, California. The Facebook website was launched on February 4, 2004, by Mark Zuckerberg, along with fellow Harvard College students and roommates, Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes.[6][7]
Facebook, Inc.
Facebook New Logo (2015).svg
Type of businessPublic
Type of site
Social networking service
Available inMultilingual (140)
Traded as
FoundedFebruary 4, 2004; 13 years ago
HeadquartersMenlo Park, California, U.S.
Coordinates37.4848°N 122.1484°W
Area servedUnited States (2004–2005)
Worldwide, except blocking countries (2005–present)
Founder(s)
Key peopleMark Zuckerberg
(Chairman and CEO)
Sheryl Sandberg
(COO)
IndustryInternet
RevenueIncrease US$27.638 billion (2016)[1]
Operating incomeIncrease US$12.427 billion (2016)[1]
Net incomeIncrease US$10.217 billion (2016)[1]
Total assetsIncrease US$64.961 billion (2016)[1]
Total equityIncrease US$59.194 billion (2016)[1]
Employees18,770 (March 31, 2017)[2]
SubsidiariesInstagram
Messenger
WhatsApp
Oculus VR
Websitewww.facebook.com or
www.fb.com
Alexa rankSteady 3 (April 2017)[3]
RegistrationRequired
UsersIncrease 1.94 billion monthly active users (March 2017)
Current statusActive
Written inC++, PHP (as HHVM)[4] and D language[5]
The founders had initially limited the website's membership to Harvard students; however, later they expanded it to higher education institutions in the Boston area, the Ivy League schools, and Stanford University. Facebook gradually added support for students at various other universities, and eventually to high school students as well. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook, though variations exist in the minimum age requirement, depending on applicable local laws.[8] The Facebook name comes from the face book directories often given to United States university students.[9]

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