The telephone industry involves all activities related to manufacturing, distributing, selling and servicing phones - devices that transmit sound (especially speech) over distance without wires.
Alexander Graham Bell: He was a Scottish-born inventor who is credited with inventing and patenting the first practical telephone.
AT&T (American Telephone & Telegraph): This is one of America's oldest telecommunications companies which had monopoly control over phone service in most parts of US until it was broken up by antitrust laws.
Landline Phones: These are traditional wired phones that transmit voice data through physical cables.
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