AT&T (Amercian Telephone and Telegraph Company) is an American based public company with history which goes back to the end of XIX century when the first telephone was invented. Originally AT&T was one of the subsidiaries of Bell Telephone Company, whose founder Alexander Graham Bell invented the telephone itself. Company was founded in 1885 and provided short and long distance calls along with telegraph services. Throughout the century it has become one the world’s largest telecommunication companies which provide wide range of services from fixed and mobile telephony to broadband internet services and digital television.
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