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Song title (?) indicates song title unconfirmed. (Name) in brackets indicates artist if not credited as ABBA (or Björn & Benny, Agnetha & Frida) |
First known recording or performance date (?) indicates date not known or unconfirmed. (NR) indicates song not recorded. |
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| Una voce poco fa | 8 May 1978 |
| Una voce poco fa | November 1979 |
| Underbar | 4 September 1981 |
| Under Attack | 2 August 1982 |
| Under Attack (instrumental) | February 2007 |
| Under Attack (TV version) | 13 November 1982 |
| Under My Sun | 10 August 1979 (?) |
| (Untitled) | 24 September 1973 |
| (Untitled jam) | circa September - November 1979 (?) |
