Compact disc
Compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony and released in 1982. The format was originally developed to store and play only sound recordings (CD-DA) but was later adapted for storage of data (CD-ROM). Several other formats were further derived from these, including write-once audio and data storage (CD-R), rewritable media (CD-RW), Video Compact Disc (VCD), Super Video Compact Disc (SVCD), Photo CD, PictureCD, CD-i, and Enhanced Music CD. The first commercially available audio CD player, the Sony CDP-101, was released October 1982 in Japan.
Mass communication
Recordings, developed in the 1870s, became the first non-print form of mass communication.  The invention of the phonograph by Thomas Edison in the late 19th century, the graphophone by Alexander Graham Bell and Charles Tainter, and the gramophone by The Victor Talking Machine Company were the first competing mass media forms that brought recorded music to the masses. Recording changed again in the 1950’s with the invention of the LP (long play) vinyl record, then eight track-tapes, followed by vinyl, and cassettes in 1965. Compact discs (CDs) followed and were seen as the biggest invention in recorded arts since Edison.