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See link below for ABBA discography.
Abba has 8 studio albums. These include: Ring Ring, Waterloo, ABBA, Arrival, The Album, Voulez-Vous, Super Trouper, and The Visitor.
See the related links to Wikipedia. There are two track lists.
Wikipedia and IMDb have complete, chronological discography for the group ABBA.
Orbital discography ended in 2004.