PBS Public Broadcasting Service (1971)

1971. Hmmmmm. Below taken from the PBS website:

Music/Sounds: A telephone-like Moog synthesizer scale descending rapidly, followed by five Moog synthesizer tones as the black dots appear.

Scare Factor: Medium bordering on high. The creepy Moog synthesizer music and primitive animation are certain to unnerve more than a few unsuspecting viewers, especially if viewed in a completely darkened room or succeeding credits with a black background. Nevertheless, this logo has a huge following, so much of a following, that, in 2007, one of the CLG members named David Gill did a documentary of his own called 1971 PBS I.D. Monologue- Part 1, which can be seen on YouTube.