The Compact Disk, or CD, is a data storage medium that was first introduced to the market in 1982. It was developed by a team of engineers at Sony led by John C. Mitchell and was initially intended to be used as a hi-fi audio playback format.

The development of the CD was a result of Sony’s efforts to create a new digital audio format that could offer better sound quality than the existing analogue formats. In 1979, Sony began development of a new digital audio format that would use a rotating optical disk to store digital audio data. The …