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Att Full Form. American telephone and telegraph, inc. Web the history of at&t dates back to the invention of the telephone.the bell telephone company was established in.
American telephone and telegraph, inc. Web the history of at&t dates back to the invention of the telephone.the bell telephone company was established in. (used to be called american telegraph & telephone) is the largest provider of both local and long distance.
(used to be called american telegraph & telephone) is the largest provider of both local and long distance. (used to be called american telegraph & telephone) is the largest provider of both local and long distance. Web the history of at&t dates back to the invention of the telephone.the bell telephone company was established in. American telephone and telegraph, inc.
