Past Masters is a two-disc compilation album set by the English rock band the Beatles. It was originally released as two separate volumes on 7 March 1988, as part of the first issue of the band's catalogue on compact disc. The album contains all songs released commercially by the band that were not available on the Beatles' 12 original UK albums or the US Magical Mystery Tour LP. It was compiled by Beatles historian Mark Lewisohn, who also wrote the liner notes.