The long-playing, or LP, format for sound recordings was one of the most important innovations in entertainment technology after World War II. In addition to extending the duration of recordings, the microgroove long-playing vinyl record brought new...

The LP (or long playing) record was developed by Peter Carl Goldmark in 1948, changing the music industry forever. Before the LP record, the standard recorded disk was the 78 rpm (revolutions per minute) record, which had several drawbacks. The disks...

A gramophone record (also phonograph record, or simply record) is an analogue sound storage medium consisting of a flat disc with an inscribed modulated spiral groove starting near the periphery and ending near the center of the disc. Gramophone records...