Noun
The side of a cassette tape or record that holds the primary track.
Antonym: B-side
(by extension) The track on the A-side of a tape or record.
The first track on a compact disc single.
Source: en.wiktionary.orgAdditionally, the Guns N' Roses performance of "Knockin' on Heaven's Door" was released in August 1992 as a double A-side with the original Guns N' Roses studio recording of the song. Source: Internet
A subsequent single was released in June, coupling the album track " No Class " as the A-side with the previously unreleased song "Like a Nightmare" on the B-side. Source: Internet
Further singles released from the album included " Viva Forever ", which was scheduled to be released as a double A-side with "Never Give Up on the Good Times", but these plans were scrapped due to Halliwell's departure from the group in May 1998. Source: Internet
Odd-numbered A-side contacts, and even-numbered B-side contacts are in the lower row (1.0 to 3.5 mm from the card edge). Source: Internet
Only the A-side of the 1976 soundtrack LP featured the Herrmann score. Source: Internet
Originally planned as a double A-side with "Never Give Up on the Good Times", the idea was dropped for several reasons, mainly due to time restraints (since there was no time to re-record and edit out Halliwell's vocals or make a video for the track). Source: Internet