MiniDisc

MiniDisc (MD) is a discontinued erasable magneto-optical disc-based data storage format offering a capacity of 60, 74, or 80 minutes of digitized audio.

Sony announced the MiniDisc in September 1992 and released it in November of that year for sale in Japan and in December in Europe, North America, and other countries. The music format was based on ATRACaudio data compression, Sony's own proprietary compression code. Its successor, Hi-MD, would later introduce the option of linear PCMdigital recording to meet audio quality comparable to that of a compact disc. MiniDiscs were very popular in Japan and found moderate success in Europe. Although it was designed to succeed the cassette tape, it did not manage to supplant it globally.

By March 2011, Sony had sold 22 million MD players, but discontinued further development. Sony ceased manufacturing and sold the last of the players by March 2013. On January 23, 2025, Sony announced they would end the production of recordable MD media in February 2025.