Twitter is a social networking and micro-blogging service that allows its users to send and read other users' updates (otherwise known as tweets), which are text-based posts of up to 140 characters in length.Founded 2006Headquarters San Francisco, California, USAKey people Jack Dorsey, Evan Williams, Biz StoneIndustry mobile social network service, micro-bloggingEmployees 31Website http://twitter.com/
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