Facebook: a timeline of the social network September 2005: Now simply called Facebook, the website opens to high school pupils. December 2005: Facebook adds universities in Australia and New Zealand, which join 21 universities in Britain, as well as universities in Canada, Mexico and Ireland and companies including Apple and Microsoft. September 2006: Facebook moves away from links to educational establishments and opens to anyone aged over 13. Yahoo! begins discussions about acquiring Facebook for as much as $1bn but no deal is reached. May 2007: At its annual event for developers, F8, Facebook announces Facebook Platform, which allows third parties to build 'applications' that run on the website. October 2007: Microsoft pays $240m for a 1.6 per cent share in Facebook and the right to put international ads on the social network. April 2008: The social network launches Facebook Chat. August 2008: Facebook reaches 100 million members. February 2009: Facebook adds the now ubiquitous 'Like' feature. August 2009: Facebook acquires FriendFeed, a social news aggregator started by a former Google engineer. July 2010: Two years after reaching 100 million members, Facebook announces that it has reached 500 million. By September 2011, membership has grown to 800 million. August 2010: Facebook launches Places, its check-in service which lets users share their location with their friends. October 2010: The Social Network, a Hollywood film about the birth of Facebook, is released in the US. December 2010: Time magazine names Mark Zuckerberg as its Person of the Year for 2010. September 2011: Facebook announces a major revision to user pages. Facebook Timeline will reorganise the way profiles are presented, allowing users to upload material from their entire lives to date. The social network also announces 'frictionless sharing' with apps including music service Spotify.