Facebook, Inc.
Facebook New Logo (2015).svg
Facebook user page (2014).jpg
Mark Zuckerberg's profile
Type of business Public
Type of site
Social networking service
Available in Multilingual (140)
Traded as
Founded February 4, 2004; 14 years ago (2004-02-04)
Headquarters Menlo Park, California, U.S.
Coordinates 37°29′05″N 122°08′54″W / 37.4848°N 122.1484°W / 37.4848; -122.1484Coordinates: 37°29′05″N 122°08′54″W / 37.4848°N 122.1484°W / 37.4848; -122.1484
Area served United States (2004–2005)
Worldwide, except blocking countries (2005–present)
Key people Mark Zuckerberg
(Chairman and CEO)
Sheryl Sandberg
Industry Internet
Revenue Increase US$40.653 billion (2017)[1]
Operating income Increase US$20.203 billion (2017)[1]
Net income Increase US$15.934 billion (2017)[1]
Total assets Increase US$84.524 billion (2017)[1]
Total equity Increase US$74.347 billion (2017)[1]
Employees 25,105 (December 31, 2017) [2]
Subsidiaries Instagram
Oculus VR
Website www.facebook.com or
Alexa rank Steady 3 (January 2018)[3]
Registration Required
Users Increase 2.2 billion monthly active users (January 2018)
Current status Active
Written in C++, PHP (as HHVM)[4] and D language[5]
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Facebook is an American online social media and social networking service company 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.

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 who claims to be at least 13 years old has been allowed to become a registered user of Facebook, though variations exist in the minimum age requirement, depending on applicable local laws. The Facebook name comes from the face book directories often given to United States university students. The company held its initial public offering (IPO) in February 2012, and began selling stock to the public three months later, reaching an original peak market capitalization of $104 billion, a new record. Facebook makes most of its revenue from advertisements which appear onscreen.

Facebook may be accessed by a large range of devices with Internet connectivity, such as desktop, laptop and tablet computers, and smartphones. After registering to use the site, users can create a customized profile indicating their name, occupation, schools attended and so on. Users can add other users as "friends", exchange messages, post status updates, share photos, videos and links, use various software applications ("apps"), and receive notifications of activity. Additionally, users may join common-interest user groups organized by workplace, school, hobbies or other topics, and categorize their friends into lists such as "People From Work" or "Close Friends". Additionally, users can complain about or block unpleasant people.

Facebook has more than 2 billion monthly active users as of June 2017. Its popularity has led to prominent media coverage for the company, including significant scrutiny over privacy and the psychological effects it has on users. In recent years, the company has faced intense pressure over the amount of fake news, hate speech and violence prevalent on its services, all of which it is attempting to counteract.

  1. ^ a b c d e "10-K Annual Report". SEC Filings. Facebook. January 28, 2017. Retrieved February 3, 2017. 
  2. ^ . Facebook. February 2, 2018 https://newsroom.fb.com/company-info/. Retrieved February 2, 2018.  Missing or empty |title= (help)
  3. ^ "Facebook.com Site Info". Alexa Internet. Retrieved January 20, 2018. 
  4. ^ Clarke, Gavin (February 2, 2010). "Facebook re-write takes PHP to an enterprise past". The Register. Situation Publishing. Retrieved March 23, 2017. 
  5. ^ Bridgwater, Adrian (October 16, 2013). "Facebook Adopts D Language". Dr Dobb's. San Francisco. 

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