The Bell System was the American Bell Telephone Company and then, subsequently, AT&T–led system which provided telephone services to much of the United States and Canada from 1877 to 1984, at various times as a monopoly. In 1984, the company was broken up into separate companies, by a U.S. Justice Department mandate.

The colloquial term Ma Bell (as in "Mother Bell") was often used by the general public in the United States to refer to any aspect of this conglomerate, as it held a near complete monopoly over all telephone service in most areas of the country, and is still used by many to refer to any telephone company. Ma Bell is also used to refer to the various female voices behind recordings for the Bell System: Mary Moore, Jane Barbe, and Pat Fleet (the current voice of AT&T).

In 1877, the American Bell Telephone Company, named after Alexander Graham Bell, opened the first telephone exchange in New Haven, Connecticut. Within a few years local exchange companies were established in every major city in the United States. Use of the Bell System name initially referred to those early telephone franchises and eventually comprised all telephone companies owned by American Telephone & Telegraph, referred to internally as Bell Operating Companies, or "BOCs".

Saul Bass (May 8, 1920 – April 25, 1996) was a graphic designer and filmmaker, perhaps best known for his design of film posters and motion picture title sequences.

During his 40-year career Bass worked for some of Hollywood's greatest filmmakers, including Alfred Hitchcock, Otto Preminger, Billy Wilder, Stanley Kubrick and Martin Scorsese. Amongst his most famous title sequences are the animated paper cut-out of a heroin addict's arm for Preminger's The Man with the Golden Arm, the credits racing up and down what eventually becomes a high-angle shot of the United Nations building in Hitchcock's North by Northwest, and the disjointed text that races together and apart in Psycho.

Bass designed some of the most iconic corporate logos in North America, including the AT&T "bell" logo in 1969, as well as AT&T's "globe" logo in 1983 after the breakup of the Bell System. He also designed Continental Airlines' 1968 "jetstream" logo and United Airlines' 1974 "tulip" logo which became some of the most recognized airline industry logos of the era.