: When EMI transitioned the Beatles' catalog to CD in 1987, they established the original 12 UK albums plus the US version of Magical Mystery Tour as the official canon.
During the 1960s, it was common practice for bands to release standalone singles that were not included on their full-length LPs. For The Beatles, this meant many of their most significant hits—such as and "Hey Jude" —were not part of their standard 12 UK studio albums. The Beatles - Past Masters (1988)
The 33-track collection is organized chronologically, showcasing the band’s rapid musical evolution over seven years. : When EMI transitioned the Beatles' catalog to
: Past Masters was compiled by Beatles historian Mark Lewisohn to ensure every song released commercially by the band was available on CD. Overview of Content The Beatles - Past Masters (1988)