| Abbreviation | Definition |
|---|---|
| IAAER | International Association for Accounting Education and Research |
| IAAI | Illinois Association of Arson Investigators |
| IAAI | Indo American Association of Iowa |
| IAAI | International Association of Arson |
| IAAIL | International Association for Artificial Intelligence and Law |
| IAAL | International Association of Afghan Lawyers |
| IAAM | International Association of Advanced Materials |
| IAAM | International Association of Auditorium Managers |
| IAAM | Iranian American Association of Memphis |
| IAAMC | International Association of Association Management Companies |
| IAAP | Indiana Association for Addiction Professionals |
| IAAP | International Association of Accessibility Professionals |
| IAAP | International Association of Accounting Professionals |
| IAAP | International Association of Analytical Psychology |
| IAAP | International Association of Angel Practitioners |
| IAAPA | International Association Against Psychiatric Assault |
| IAAPA | International Association of Amusement Park and Attractions |
| IAAPA | International Axis and Allies Players Association |
| IAAS | International Association for Astronomical Studies |
| IAASA | Indian Australian Association of South Australia |