| Abbreviation | Definition |
|---|---|
| AHA | American Heart Association's |
| AHA | American Hippotherapy Association |
| AHA | American Homebrewers Association |
| AHA | Arabian Horse Association |
| AHAA | Alliance Homeschool Accountability Association |
| AHAA | Arabian Horse Association of Arizona |
| AHAA | Association of Historians of American Art |
| AHAA | Auto Haulers Association of America |
| AHAC | Amateur Hockey Association of Canada |
| AHAM | Arabian Horse Association of Michigan |
| AHAM | Association for Home Appliance Manufacturers |
| AHAM | Association of Happiness for All Mankind |
| AHAM | Association of Home Appliance Manufacturers |
| AHAP | Association for Healthcare Administrative Professionals |
| AHATA | Aruba Hotel And Tourism Association |
| AHB | Association of Home Businesses |
| AHC | Association for Humanistic Counseling |
| AHCA | American Highland Cattle Association |
| AHCA | American Horsemen Challenge Association |
| AHCA | Arizona Health Care Association |