| Abbreviation | Definition |
|---|---|
| AIRF | Appraisal Institute Relief Foundation |
| AIRP | American Institute for Radiologic Pathology |
| AIRPM | Associate of the Institute of Residential Property Management |
| AIRS | Africa Institute of Researchers and Scholars |
| AISC | American Institute of Steel Construction |
| AISF | Australasian Institute of Surface Finishing |
| AISI | American Indian Summer Institute |
| AISI | American Iron and Sleei Institute |
| AISI | American Iron and Steel Institute |
| AISI | American Iron and Steel Institutes |
| AISR | Annenberg Institute for School Reform |
| AISS | Achievement Institute of Scientific Studies |
| AISS | Afghan Institute for Strategic Studies |
| AISS | Amsterdam Institute of Sport Science |
| AISS | Ashland Institute For Strategic Studies |
| AIST | Australian Institute of Superannuation Trustees |
| AIT | American Institute of Trucking |
| AIT | Appear Institute of Technology |
| AIT | Athlone Institute of Technology |
| AITF | Anchor Institutions Task Force |