| Abbreviation | Definition |
|---|---|
| OCAA | Omnibus Consolidated Appropriations Act of 1997, P.L. 104-368 |
| OCAA | Orange County Attorneys Association |
| OCAC | Office of Court Appointed Counsel |
| OCAC | Office of Court Appointed Counsel's |
| OCAVI | Observatorio Centroamericano sobre Violencia (The Central American Observatory on Violence) |
| OCB | Organize Crime Brutality |
| OCB | Organized Crime Bureau |
| OCCD | Oregon Council on Crime and Delinquency |
| OCCR | Organized Crime and Corruption Reporting |
| OCCRP | Organized Crime and Corruption Reporting Project |
| OCCRP | Organized Crime and Curruption Reporting Project |
| OCDA | Orange County District Attorney |
| OCDU | Organised Crime Detection Unit |
| OCEA | Oklahoma Code Enforcement Association |
| OCFOC | Oakland County Friend of the Court |
| OCG | Organized Crime Group |
| OCI | Office of Criminal Investigations |
| OCIC | Orange County Imperial Court |
| OCIC | Organized Crime Investigations Commission |
| OCID | Organised Crime Investigation Division |