An acetate disc is a type of phonograph record generally used from the 1930s to the late 1950s for recording and broadcast purposes and sees limited use as of 2009. Despite their name, "acetate" discs do not contain any acetate.

Electrical transcriptions are special phonograph recordings made exclusively for radio broadcasting, which were widely used during the "Golden Age of Radio". They provided material—from station-identification jingles and commercials to full-length programs—for use by local stations, which were affiliates of one of the radio networks.