| Abbreviation | Definition |
|---|---|
| OJI | O. J. Innocent |
| OJI | Ontario Justice International |
| OJJ | Office of Juvenile Justice |
| OJL | Orphan Justice League |
| OJLS | Oxford Journal of Legal Studies |
| OJN | Office of Juvenile Nutcases |
| OJO | Of the Judicial Officer |
| OJS | Office of Judicial Support |
| OJS | Office of Justice Services |
| OJS | Online Judicial System |
| OJW | Outstanding Judgement Warrant |
| OKAY | Overseas Korean Artists Yearbook |
| Okla.Ct.Crim.App. | The Oklahoma Court of Criminal Appeals |
| OLAP | Online Legal Access Project |
| OLAP | Ontario Legal Aid Program |
| OLC | Ohio Law Component |
| OLC | Or Law Coverage |
| OLCMS | Online Legal Case and Monitoring System |
| OLCMS | Online Legal Case Management System |
| OLCMS | Online Legal Case Monitoring System |