| Abbreviation | Definition |
|---|---|
| AAZ | Automobile Association of Zimbabwe |
| ABA | Accident Benefit Association |
| ABA | American Bakers Association |
| ABA | American Bantam Association |
| ABA | American Beverage Association |
| ABA | American Bridge Association |
| ABA | Association for Behavior Analysis |
| ABAA | Air Barrier Association of America |
| ABAA | Air Barrier Association of America's |
| ABAA | Antiquarian Booksellers Association of America |
| ABAA | Antiquarian Booksellers' Association of America |
| ABAC | Association of Business and Administrative Computing |
| ABAD | Association of Builders and Developers |
| ABAI | Amateur Basketball Association of Ireland |
| ABAI | Association for Behavior Analysis International |
| ABAI | Association of Behavior Analysis International |
| ABAJ | Antiquarian Booksellers Association of Japan |
| ABARI | Auto Body Association of Rhode Island |
| ABASA | American Bankers Association Securities Association |
| ABASA | Artist Blacksmiths Association South Australia |