LPRECORD
LP record
The LP, or 33⅓ rpm microgroove vinyl record, is a format for phonograph records, an analog sound storage medium. Introduced by Columbia Records in 1948, it was soon adopted as a new standard by the entire record industry. Apart from relatively minor refinements and the important later addition of stereophonic sound capability, it has remained the standard format for vinyl albums.The above text is a snippet from Wikipedia: LP record
and as such is available under the Creative Commons Attribution/Share-Alike License.