The Beatles: Paul McCartney (vocals, guitar, keyboards, bass); John Lennon (vocals, guitar, keyboards); George Harrison (vocals, guitar, synthesizer); Ringo Starr (vocals, drums, percussion).

The last Beatles album to be recorded (although Let It Be was the last to be released), Abbey Road was a fitting swan song for the group, echoing some of the faux-conceptual forms of Sgt. Pepper, but featuring stronger compositions and more rock-oriented ensemble work. The group was still pushing forward in all facets of its art, whether devising some of the greatest harmonies to be heard on any rock record (especially on "Because"), constructing a medley of songs/vignettes that covered much of side two, adding subtle touches of Moog synthesizer, or crafting furious guitar-heavy rock ("The End," "I Want You (She's So Heavy)," "Come Together"). George Harrison also blossomed into a major songwriter, contributing the buoyant "Here Comes the Sun" and the supremely melodic ballad "Something," the latter of which became the first Harrison-penned Beatles hit. Whether Abbey Road is the Beatles' best work is debatable, but it's certainly the most immaculately produced (with the possible exception of Sgt. Pepper) and most tightly constructed. ~ Richie Unterberger

After the laborious disorganization and infighting that characterized early 1969's LET IT BE sessions (as famously captured on film), the fractious four were willing to let George Martin take the reins and to work with him as a cohesive unit for the much more succinct production of their (and the decade's) swan song, ABBEY ROAD. The superb performances make the album an artistic high point for all members of the group. Paul McCartney inspired the suite of songs that begins with "You Never Give Me Your Money." Often thought of as two long medleys, the songs that fill most of the second half of ABBEY ROAD segue seamlessly into one another, but are programmed as separate CD tracks. George Harrison had his first A-side on a Beatles' single ("Something"); John Lennon contributed a pair of heavy rockers ("Come Together" and "I Want You"); and Ringo Starr's "Octopus's Garden" was a favorite with children.