| Abbreviation | Definition |
|---|---|
| AYSS | Association of Yacht Support Services |
| AZA | Association of Zoos Aquariums |
| AZA | Australian Zoroaster Association |
| AZBA | Association of Zimbabweans Based Abroad |
| AZH | Association of Zoological Horticulture |
| BAA | Birmingham Anglers Association |
| BAA | Brand Activation Association |
| BAA | Brick Appreciation Association |
| BAA | British Astronomical Association |
| BAA | British Awarding Association |
| BAAA | Barryville Area Arts Association |
| BAAA | Bay Area Apartment Association |
| BAAA | Bay Area Assessors Association |
| BAAA | Bay Area Autodueling Association |
| BAAA | Bitterly Angry Asswipe Association |
| BAAA | Boonsboro Area Athletic Association |
| BAAC | Builders Association of Adams County |
| BAAF | British Association for Adoption and Fostering |
| BAAF | British Association for Adoption Fostering |
| BAAF | British Association of Adoption and Fostering |