| Abbreviation | Definition |
|---|---|
| OJA | Office of Juvenile Affairs |
| OJB | Overcoming Jury Bias |
| OJC | Ohio Judicial Conference |
| OJD | Oregon Judicial Department |
| OJG | O. J. Guilty |
| OJI | O. J. Innocent |
| OJJ | Office of Juvenile Justice |
| OJN | Office of Juvenile Nutcases |
| OJW | Outstanding Judgement Warrant |
| OKAY | Overseas Korean Artists Yearbook |
| OLAP | Online Legal Access Project |
| OLAP | Ontario Legal Aid Program |
| OLC | Office of Legal Council |
| OLP | Organization of Legal Professionals |
| OLPA | Omaha Legal Professionals Association |
| OLR | Ontario Law Reports |
| OLS | Office of Legal Services |
| OLTI | OnLine Training Institute |
| OM | Other Male |
| OMC | Operation Machina Counterfeit |