| Abbreviation | Definition |
|---|---|
| OGT | Ohio Graduation Test |
| OGV | Oak Glen Varsity |
| OHCE | Oklahoma Home and Community Education |
| OHCE | Oral Health Care Education |
| OHE | Oral Health Education |
| OHEA | Oak Harbor Education Association |
| OHEA | Oregon Home Educators Association |
| OHEP | Office of Health Education and Promotion |
| OHEP | Office of Health Education Promotion |
| OHEP | Ontario Hunter Education Program |
| OHI | Other Health Impairment |
| OHPE | Office of Health Professional Education |
| OHSE | Office of Health Sciences Education |
| OHT | Oral History Technique |
| OHTI | Oral History Technical Issues |
| OI | Office of Investigation |
| OI | Oriental Institute |
| OI | Orthopedic Impairment |
| OIAL | Office of Impact Assessment and Learning |
| OIE | Office of Indian Education |