| Acronym | Definition |
|---|
| OIAA➣Ontario Insurance Adjusters Association (Canada) |
| OIAA➣Office of Inter-American Affairs |
| OIAA➣Office of International and Academic Affairs (US National Institute of Standards and Technology) |
| OIAA➣Office of Information Analysis and Access (US EPA) |
| OIAA➣Onion-Induced Antiplatelet Activity |