A phonograph record (also known as a gramophone record, vinyl record, or simply vinyl or record), is an analog sound storage medium in the form of a flat polyvinyl chloride (previously shellac) disc with an inscribed, modulated spiral groove. The groove usually starts near the periphery and ends near the center of the disc.
The phonograph disc record was the primary medium used for music reproduction until late in the 20th century. In the 1980s the introduction of digital media led to vinyl leaving the mainstream in 1991. During the 1990s vinyl was relegated to a niche market but began to make a resurgence in the 2000s. The increased popularity of vinyl has led to the investment in new and modern record-pressing machines.