| Acronym | Definition |
|---|
| OAA➣Older Americans Act |
| OAA➣Ontario Association of Architects |
| OAA➣Open Arcade Architecture |
| OAA➣Oxford Aviation Academy (various locations) |
| OAA➣Old Age Assistance |
| OAA➣Oxaloacetate |
| OAA➣Office of Academic Affiliations (Department of Veterans Affairs) |
| OAA➣Office for Academic Affairs (various schools) |
| OAA➣Outstanding Achievement Award |
| OAA➣Ontario Association of Archers (Ontario, Canada) |
| OAA➣Open Agent Architecture |
| OAA➣Obstetric Anaesthetists' Association |
| OAA➣Office of Academic Assessment (various schools) |
| OAA➣Open Access Archive |
| OAA➣Office of the Administrative Assistant (US Army) |
| OAA➣Organic Acidemia Association (Plymouth, MN) |
| OAA➣Ontario Accommodation Association (Canada) |
| OAA➣Out and About |
| OAA➣Organization of Africans in the Americas |
| OAA➣Orbiter Access Arm (US NASA) |
| OAA➣Offender Accountability Act (State of Washington, USA) |
| OAA➣Other Adjustments Account (US Federal Tax Form 1120s) |
| OAA➣Radar Test Equipment (US Navy) |
| OAA➣Over Actors Anonymous |
| OAA➣Oakland Activities Association (Michigan) |
| OAA➣On Air Activation |
| OAA➣Ohio Aquaculture Association |
| OAA➣Over Air Addressing |
| OAA➣Operational Assessment Analysis |
| OAA➣Online Access Agreement (disclaimer document) |
| OAA➣Ocean Atlantic Agency (Delaware) |
| OAA➣Optician's Association of America |
| OAA➣Oklahoma Aquaculture Association |
| OAA➣Open Access Architecture (West Wave) |
| OAA➣Over the Air Activation Signal |
| OAA➣Operations, Activities and Actions |
| OAA➣Owner Agency Agreement (commercial real estate) |
| OAA➣Order of American Ambassadors |