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Google runs over one million servers in data centers around the world,[14] and processes over one billion search requests[15] and twenty petabytes of user-generated data every day.[16][17][18] Google's rapid growth since its incorporation has triggered a chain of products, acquisitions and partnerships beyond the company's core search engine. The company offers online productivity software, such as its Gmail e-mail software, and social networking tools, including Orkut and, more recently, Google Buzz.

MySpace is a social networking website. Its headquarters are in Beverly Hills, California[5] where it shares an office building with its immediate owner, News Corp. Digital Media, owned by News Corporation. MySpace became the most popular social networking site in the United States in June 2006.[6] According to comScore, MySpace was overtaken internationally by its main competitor, Facebook, in April 2008, based on monthly unique visitors.[7][8] MySpace employs 1,000 employees, after laying off 30 percent of its workforce in June 2009;[9] the company does not disclose revenues or profits separately from News Corporation. The 100 millionth account was created on August 9, 2006,[10] in the Netherlands.[11]

Facebook is a social networking website launched in February 2004 that is operated and privately owned by Facebook, Inc.,[1] with more than 500 million[5] active users in July 2010, which is about one person for every fourteen in the world.[6][N 1] Users can add people as friends and send them messages, and update their personal profiles to notify friends about themselves.

Facebook was founded by Mark Zuckerberg with his college roommates and fellow computer science students Eduardo Saverin, Dustin Moskovitz and Chris Hughes.[7] 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, finally, to anyone aged 13 and over.

A January 2009 Compete.com study ranked Facebook as the most used social network by worldwide monthly active users, followed by MySpace.[16] Entertainment Weekly put it on its end-of-the-decade 'best-of' list, saying, "How on earth did we stalk our exes, remember our co-workers' birthdays, bug our friends, and play a rousing game of Scrabulous before Facebook?"

Google Buzz is a social networking and messaging tool from Google that is integrated into the company's web-based email program, Gmail.[1][2] Users can share links, photos, videos, status messages and comments organized in "conversations" and visible in the user's inbox.[3]

Buzz enables users to choose to share publicly with the world or privately to a group of friends each time they post.[4] Picasa, Flickr, Google Reader, YouTube, Blogger, FriendFeed, identi.ca and Twitter are currently integrated. The creation of Buzz was seen by industry analysts as an attempt by Google to compete with social networking websites like Facebook and microblogging services like Twitter.