| Abbreviation | Definition |
|---|---|
| AHRPP | Association for the Accreditation of Human Research Protection Program |
| AHRS | Association of Hair Restoration Surgeons |
| AHSA | African Horse Safari Association |
| AHSE | American Society for Healthcare Engineering |
| AHSE | Association for Hanna Somatic Education, Inc. |
| AHVRP | Association for Healthcare Volunteer Resource Professionals |
| AIA | American Importers Association |
| AIA | American Institute of Architects |
| AIA | American Insurance Association |
| AIA | American Inventors Association |
| AIA | Analytical Instruments Association |
| AIA | Association Internationale Africaine |
| AIA | Association of Insurance Advertisers |
| AIA | Association of International Accountants |
| AIAA | American Institute of Aeronautics and Astronautics |
| AIAG | Automotive Industry Action Group |
| AIB | American Institute of Baking |
| AIB | American Institute of Banking |
| AIB | Association for International Business |
| AIBD | Association of International Bond Dealers |