Gramophone Record

A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after about 1950), or colloquially, 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 (12-inch, 10-inch, 7-inch, etc.), the rotational speed at which they are played ("331⁄₃ rpm", "78", "45", etc.), their time capacity ("long playing"), their reproductive accuracy, or "fidelity", or the number of channels of audio provided ("mono", "stereo", "quadraphonic", etc.).

Phonograph 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 in 1991. However, they continue to be manufactured and sold in the 21st century. The vinyl record regained popularity by 2008, with nearly 2.9 million units shipped that year, the most in any year since 1998 and the format has continued to slowly regain popularity. They are especially used by DJs and audiophiles for many types of music. As of 2012, vinyl records continue to be used for distribution.