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Beatles Albums from WikiPedia:

In their native United Kingdom during 1962–1970, the rock group The Beatles released 12 studio albums, 13 EPs, and 22 singles. However, the band's international discography is complicated, due to different versions of their albums sometimes being released in other countries, particularly during their early years on Capitol Records in the United States. The Beatles' discography was originally released on the vinyl format, with full-length long plays (LPs), shorter EPs, and singles. Over the years, the collection has also been released on cassette, 8-track, and compact disc (CD).

Most of The Beatles' albums were released in both mono and stereo. Since mono record players were the most common at the time, The Beatles and their regular producer George Martin gave more time and attention to preparing mono mixes of their recordings. The Beatles had only involved themselves in creating the mono mixes for the first four albums; the stereo mixes were prepared without their supervision. Nevertheless, since by the late 60s, stereo record players became more common, their final two albums—Abbey Road and Let It Be—were mixed and released in stereo only.

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