▪ American company
 American company offering online social networking services. Facebook was founded as a social networking Web site in 2004 by Mark Zuckerberg, Dustin Moskovitz, and Chris Hughes, all of whom were students at Harvard University. Membership was initially limited to Harvard students but gradually expanded to include all college students, high school students, and, eventually, anyone past age 13. The site generates revenue through advertising. Facebook headquarters are in Palo Alto, Calif.

      Access to Facebook online is free of charge. New users can create profiles, upload photos, join a preexisting network, and start new networks. The site has many components, including the Wall, a space on each user's profile page where friends can post messages; Status, which enables users to alert friends to their current location or situation; and News Feed, which informs users of changes to a friend's profile.

      Facebook added numerous features following its inception. For example, it allowed users to create their own blogs starting in August 2006. In February 2007 it launched Gifts, which allowed users to send virtual gifts (icons) to friends for a nominal fee. A few months later the company launched Facebook Marketplace, which allowed users to post free classified ads, and Facebook Platform, which enabled users to create new applications that interacted with or enhanced existing Facebook applications. In June 2008 the company made part of its software code open source (essentially copyright free), as Facebook Open Platform, in order to entice more third-party software developers into writing applications that enhance the features in its social networking site. This move was widely seen as a response to one of its competitors, Google, which launched Open Social in November 2007 in order to make it easier for developers to write applications for MySpace and other competing social networking sites. In November 2007 Facebook launched Facebook Beacon, which allowed users to share information from other Web sites, including information about their activities on those Web sites.

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Universalium. 2010.

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