| Abbreviation | Definition |
|---|---|
| AIHF | American Institute of Healthcare and Fitness |
| AIHF | Asociacion Internacional de Historia Ferroviaria |
| AIIS | American Institute of Indian Studies |
| AILA | Association Internationale de Linguistique Appliq??e |
| AILA | Association Internationale de Linguistique Appliqée |
| AIM | Africa Island Mission |
| AIM | American Indian Movement |
| AIM | Amputees In Motion |
| AIM | Angels In Motion |
| AIM | Annual Institutional Membership |
| AIM | Asthma Initiative of Michigan |
| AIMD | American Institute for Managing Diversity |
| AIMD | Associazione Italiana Manoscritti Datati |
| AIMF | Aspen International Mountain Foundation |
| AIMIRS | Association for the Improvement of Minorities in the Internal Revenue Service |
| AIMS | Association for Improvement of Maternity Services |
| AIMS | Attendance Inter-club Membership Service |
| AINET | Advocates International Network |
| AIO | American Indian Opportunities |
| AIO | Americans for Indian Opportunity |