Bell System

Background
The Bell System was a system of companies led by the Bell Telephone Company and later by AT&T, which dominated the telephone services industry in North America for 100 years, from its creation in 1877 until its antitrust breakup in 1983.

1st Logo (1940)


Logo: TBA.

Technique: Just the fading.

Music/Sounds: The closing theme of the short.

Availability: Extinct.

2nd Logo (1958)


Logo: TBA.

Technique: None.

Music/Sounds: The opening theme to the film.

Availability: Extinct.

3rd Logo (1960)


Logo: Same as the previous logo, but the background is now dark, the Bell System logo is now copper, and is now more detailed and has a three-dimensional look.

Technique: None.

Music/Sounds: An announcer saying the following words: "The Bell Telephone System brings you another of its series of programs on science, man's effort to understand nature's laws."

Availability: Extinct.

4th Logo (1976)
Logo: We see multiple outlines of the Bell System logo in different colors on a black background. They then form into one in blue outline. It stands up and it flips, making the logo entirely blue. While its happening, text in white shows up, which are the following:

Finally, we see the Bell System logo.
 * Bell of Pennsylvania
 * C&P Telephone
 * Ohio Bell
 * New England Telephone
 * New Jersey Bell
 * Indiana Bell
 * Southern New England Telephone
 * Pacific Telephone
 * Michigan Bell
 * Pacific Northwest Bell
 * Southern Bell
 * Nevada Bell
 * South Central Bell
 * New York Telephone
 * Mountain Bell
 * Cincinnati Bell
 * Wisconsin Telephone
 * Northwestern Bell
 * Illinois Bell
 * Diamond State Telephone
 * Southwestern Bell
 * Western Electric
 * Bell Labs
 * Long Lines
 * AT&T

Trivia: This was created for the Bell System's 100th anniversary in 1976.

Variants:
 * More than once, its abridged to only show the final product.
 * Sometimes, the copyright year appears below the logo.

Technique: The animation for the Bell logo and the text, which are in 2D animation.

Music/Sounds: Multiple telephone beeps, as well as catchy synth music.

Music/Sounds Variant: Sometimes, an announcer can be heard.

Availability: Extinct. Only seen on commercials/programs at the time.

5th Logo (March 1, 1983)
Logo: On a blue background with a dark blue map of America, the Bell System logo reveals itself via flipping, much like the previous logo.

Technique: Scanimate.

Music/Sounds: The closing theme of the show, along with an announcer saying "AT&T and the Bell System Company."

Availability: Seen at the end of a March 1, 1983 airing of The MacNeil/Lehrer NewsHour.