| Abbreviation | Definition |
|---|---|
| OBEC | Ohio Boating Education Course |
| OBEC | Oklahoma Business and Education Coalition |
| OBEMLA | Office of Bilingual Education and Minority Language Affairs |
| OBET | Outcomes Based Education and Training |
| OBEWL | Office of Bilingual Education and World Languages |
| OBJ | Only Brings Joy |
| OBL | Object Based Learning |
| OBL | Online Burma Library |
| OBL | Out Bound Learning |
| OBL | Outward Bound Learning |
| OBLT | Oceanside Building Learning Together |
| OBO | One By One |
| OBP | Open Book Project |
| OBP | Open Boot Prom |
| OBQ | Open Book Questions |
| OBTA | Ohio Business Teachers Association |
| OBTA | Outstanding Biology Teacher Award |
| OBTL | Outcome Based Teaching and Learning |
| OBTL | Outcomes Based Teaching and Learning |
| OC | Operation Classroom |