The Compact Disc (CD) is a digital optical disc storage format that was introduced in 1982. The format was developed by Sony and Philips. CDs are used to store digital audio data, which can be played back on a CD player.

A Compact Cassette (or simply cassette) is a magnetic tape audio storage format introduced by Philips in 1962. It was originally designed for dictation, but became a popular music format after the development of the Walkman in 1979.

CD players and cassette players are both audio playback devices that use magnetic cartridges to play back audio recordings. Cassette players …