Union is the thirteenth studio album by British progressive rock band Yes, released in 1991. It was so called because it brought together the previous Yes album's lineup (Chris Squire, Trevor Rabin, Alan White, Tony Kaye) and the then ex-Yes members group Anderson Bruford Wakeman Howe (Jon Anderson, Bill Bruford, Rick Wakeman, and Steve Howe).

After Big Generator in 1987, Jon Anderson teamed up with ex-Yes men Steve Howe, Rick Wakeman and Bill Bruford. The result was Anderson Bruford Wakeman Howe, released in 1989 and supported by a successful tour. Because of the separate existence of Yes (part of the band's name still being owned by Chris Squire), this alternate incarnation were forced to use their surnames as the band's name after Squire threatened legal action. Meanwhile, Yes began composing and recording material for their follow-up, while Anderson Bruford Wakeman Howe did the same, beginning production at Miraval Studios in the South of France in April 1990.

Bowing to record company pressure to resurrect the Yes banner, Squire and Anderson came up with the idea of merging both projects, which resulted in the 1991 album Union. In the meantime the ABWH material had been extensively reworked under the supervision of producer Jonathan Elias, which involved replacing many of Howe's guitar parts with new ones played by session musician Jimmy Haun. Similarly, with Wakeman unavailable because of his heavy touring schedule as a solo artist, many of the keyboard parts were redone by a variety of players in a variety of studios in Los Angeles and New York. Post-production also involved Chris Squire adding backing vocals to a couple of ABWH tracks, but this would remain the extent of the "reunion" of the 1971–72 line-up as bass parts on the tracks were performed by Tony Levin.

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The Yes Album is the third studio album from the English progressive rock band Yes, released on Atlantic Records. It is the last record to feature keyboardist Tony Kaye until 1983, and the first to feature guitarist Steve Howe, who replaced Peter Banks in 1970. The album was written and rehearsed at a farmhouse in Devonshire, then home to Langley Studios, which was later bought by Howe who now lives there.

Upon its release in February 1971, The Yes Album peaked at number 4 on the UK Albums Chart and number 40 on the US Billboard 200, where it was certified platinum by the Recording Industry Association of America. The Yes Album is seen as the group's breakthrough release, setting the stage for their success with their following albums Fragile (1971) and Close to the Edge (1972).

Jon Anderson is credited as John Anderson on the album. Soon after, he dropped the "h" from his first name.

The album cover shows Tony Kaye with his foot in a cast. He had been in a car accident shortly before the picture was taken.

Yes may refer to:

An album may be understood as a collection of recordings, released as a single package on gramophone record, cassette, compact disc, or via digital distribution, however the concept is found in printed music dating into the early nineteenth century in works by composers such as Schumann and Mendelssohn. The word derives from the Latin word for list.

Today, with the vinyl record no longer being used as the primary form of distribution, the term "album" can still be applied to any sound recording collection, such as those on compact disc, MiniDisc, Compact audio cassette, and digital or MP3 albums.Cover art is also considered an integral part of the album. Many albums also come with liner notes and inserts giving background information or analysis of the recording, reprinted lyrics, images of the performers, or additional artwork and text. These are now often found in the form of CD booklets.

Vinyl LP records have two sides, each comprising one half of the album. If a pop or rock album contained tracks released separately as commercial singles, these were often traditionally placed in particular positions on the album. A common configuration was to have the album led off by the second and third singles, followed by a ballad. The first single would lead off side 2. In the past many singles (such as the Beatles' "Hey Jude" and Bob Dylan's "Positively 4th Street") did not appear on albums, but others (such as the Beatles' "Come Together" and Dylan's "Like a Rolling Stone") were part of an album released concurrently. Today, many commercial albums of music tracks feature one or more singles, which are released separately to radio, TV or the Internet as a way of promoting the album. Albums have also been issued that are compilations of older tracks not originally released together, such as singles not originally found on albums, b-sides of singles, or unfinished "demo" recordings.