| Abbreviation | Definition |
|---|---|
| AJMT | Australian Journal of Music Therapy |
| AJR | Artist Jazz Recordings |
| AJV | Abyssinian Jazz Vespers |
| AK | Atomic Kitten |
| AKA | American Kettlebell Alliance |
| AKB | Amsterdam Klezmer Band |
| AKM | All Kinds of Music |
| AKMS | Any Key Music System |
| AKOM | A Kind Of Magic |
| AKOMA | All Kinds Of Music Agency |
| AL | Ad Libitum |
| ALAHP | As Loud As Humanly Possible |
| ALAJE | Afro Latin American Jazz Ensemble |
| ALCB | American Legion Community Band |
| ALCM | Association of Lutheran Church Musicians |
| ALMA | Art Language Music Alliance |
| ALNM | A Little Nerd Music |
| ALNM | A Little New Music |
| ALNM | A Little Night Music |
| AM | Americana Music |