| Acronym | Definition |
|---|
| OOA | Out of Office Assistant (software: Microsoft Outlook) |
| OOA | Object Oriented Analysis |
| OOA | Ohio Optometric Association (Worthington, OH) |
| OOA | Out-of-Autoclave (manufacturing) |
| OOA | Out of Area |
| OOA | Out of Africa |
| OOA | Oracle of Ages (Zelda Series) |
| OOA | Ohio Osteopathic Association |
| OOA | Open Ocean Aquaculture |
| OOA | Oklahoma Osteopathic Association (est. 1900) |
| OOA | Other Operating Assets |
| OOA | Out of Air (SCUBA diving) |
| OOA | Office of the Americas (Los Angeles, CA, USA) |
| OOA | Old Order Amish |
| OOA | On Or About |
| OOA | Order of Appearance |
| OOA | Out of Ammo |
| OOA | Office of Agriculture (various organizations) |
| OOA | Ordered Orthogonal Array |
| OOA | Out Of Area/Action |