| Abbreviation | Definition |
|---|---|
| OA | Office of Audit |
| OA | Operation Administrations |
| OAA | Ohio Achievement Assessment |
| OAC | Ontario Academic Credit |
| OACE | Oakland Adult and Career Education |
| OACE | Office of Adult and Continuing Education |
| OACE | Office of Adult Continuing Education |
| OACE | Oregon Association for Comprehensive Education |
| OAE | Office of Accessible Education |
| OAE | Ohio Assessments for Educators |
| OAEF | Oregon Agricultural Education Foundation |
| OAET | Older Adult Educational Tourism |
| OAKS | Outdoor Awareness Knowledge And Science |
| OAL | Other Areas of Learning |
| OALA | Office of Access and Learning Accommodation |
| OALN | Object Attribute Learning Network |
| OALP | Open Access Learning Program |
| OAME | Ontario Association for Mathematics Education |
| OAP | Outgoing Active And Positive |
| OAP | Outgoing, Active, and Positive |