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Facebook

Launched in February 2004, Facebook is a social networking service founded by Mark Zuckerberg with his college roommates and fellow students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes. Early investors included Microsoft and Hong Kong tycoon Li Ka- shing, through his namesake charitable foundation.

Facebook is targeting advertising spending currently earmarked TV commercials. Photo: AP

Facebook reveals daily users for US and UK

One out of three people in the United States - more than 128 million - visit Facebook every day, and about 24 million in the United Kingdom do the same, the company said on Tuesday, releasing regional data for the first time as a way of helping advertisers understand how people use the social net