A gramophone record, commonly known as a record, is an analog sound storage medium consisting of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near the periphery and ends near the center of the disc. Phonograph records are generally described by their diameter in inches, the rotational speed at which they are played, or the number of channels of audio provided (mono, stereo, or quadraphonic).
Vinyl records were the primary medium used for music reproduction for most of the 20th century, replacing the phonograph cylinder, with which it had co-existed, by the 1920s. By the late 1980s, digital media had gained a larger market share, and the vinyl record left the mainstream.