| Abbreviation | Definition |
|---|---|
| AAS | Almost A Star |
| ABAC | Ahead By A Century |
| ABAMP | Awkward Band And Musician Photos |
| ABAO | Asociaci??n Bilbaina de Amigos de la ??pera |
| ABAO | Asociación Bilbaina de Amigos de la Ópera |
| ABB | Allman Brothers Band |
| ABB | Always Better Band |
| ABBA | Agnetha Bjorn Benny Anni |
| ABBA | Agnetha/ Bj??rn/ Benny/ Anni-Frid |
| ABBA | Agnetha/ Björn/ Benny/ Anni-Frid |
| ABCD | Association of British Choral Directors |
| ABEG | Auckland Bangladeshi Entertainment Group |
| ABF | American Banjo Fraternity |
| ABH | Amateur Bass Hub |
| ABH | Autonomous Bass Head |
| ABITW | Another Brick In The Wall |
| ABK | Australian Born Killers |
| ABM | Acoustic Body Music |
| ABM | Ashdown Bass Magnifier |
| ABMA | Alabama Bluegrass Music Association |