PRISM

Background
PRISM (Philadelphia Regional In-Home Sports and Movies) was an American regional cable television channel intended for cable customers in the Philadelphia, PA metropolitan area. Launched in September 1976, PRISM was primarily broadcast through area cable systems, although it was also available through a scrambled signal on WWSG-TV from 1983 to 1985. The channel's programming consisted primarily of theatrically released motion pictures, although it was most well known for its telecasts of sporting events. It was owned by various companies, and then it was shut down in 1997.

1st Logo (September 1, 1976-1980)
Logo: Three curvy zig-zagging white lines move horizontally across the screen. Above the lines are 4 colored triangles (green, yellow, blue and red) arranged in a semicircle and below are a line of yellow icons of people performing various activities with a white camera icon in the center. The lines form the word "PRISM" in a striped 1970s font and the finished animation fades to a static card version in which the people icons are various colors.

FX/SFX: The lines forming the word and the crossfade to the finished result.

Music/Sound: A series of arpeggiated electronic beeps that abruptly cut out once the logo animation is finished.

Availability: Extinct.

Legacy: The crossfade from the animated logo to the still image is rather poorly done, as the two don't line up.

2nd Logo (1980-1982)
Logo: On a space background with a black surface, a prism is rotating and many lights come to it and the prism emits rainbows. The word "PRISM" emerges and moves on the center while the prism transforms into the mid-circle from the previous logo and moves to the top of the screen. The word glows in blue and shines.

FX/SFX: Scanimation is used to create the logo, and it looks good. Represents something like digital CGI, thus making it advanced for the time.

Music/Sounds: A majestic fanfare with synth sounds.

Availability: Extinct.

3rd Logo (1982-1985)
Logo: Rays of light form the PRISM logo, and then it colors itself in rainbow colors, making the rays disappear. The logo then shines.

FX/SFX: The logo forming.

Music/Sounds: A bouncy jazz ensemble with twinkle effects throughout.

Availability: Extinct.

4th Logo (1985-1990)
Logo: On a black background (later changed to a black/blue gradient one with lines in 1988), an outlined PRISM logo and a cyan bold copy move and meet each other, forming the result and suddenly it changes to it's rainbow colors.

FX/SFX: The word "PRISM" forming.

Music/Sounds:
 * 1985-1988: A funky theme.
 * 1988-1990: A news-styled theme.

Availability: Extinct.

5th Logo (1990-1992)
Logo: We see bendy transparent objects that look like I's wavering around and finally move into place, moving into a rectangle reading "PRISM" without lines. The I's go inside the rectangle, filling "PRISM" with lines. The rectangle moves downward, revealing a silver outlined "PRISM". A rainbow ray hits it and "PRISM" shines and is colored rainbow.

FX/SFX: Splendid use of CGI, holding up even today.

Music/Sounds: A synth tune with drumbeats.

Availability: Extinct.

6th Logo (1991)
Logo: We see close-ups of the letters "15th Prism Anniversary" (the Prism word is the logo), while videos from the previous logos play. After that, the camera then reveals the letters.

FX/SFX: Everything, made in CGI.

Music/Sounds: A new wave-esque tune.

Availability: Extinct. Used only for PRISM's 15th anniversary.

7th Logo (1993-October 1, 1997)
Logo: On a background with changing colors, we see a close-up of a prism. It zooms away, and then a silver/gold rectangle appears, where the black word "PRISM", in the Univers font, appears letter-by-letter.

Variant: On sports, the rectangle is metallic and bigger.

FX/SFX: Everything in a very awesome mixing of live-action and CGI.

Music/Sounds: A string/drum piece progressing in pitch, ending in a 5-note chime theme.

Music/Sounds Variant: The sports variant uses a short sports-like theme.

Availability: Extinct.

It's a beautiful logo.