| Abbreviation | Definition |
|---|---|
| OIP | Office of Information and Privacy |
| OIP | Office of the Iraq Program Oil for Food |
| OIPE | Office of Initial Patent Examination |
| OIS | Office Information System |
| OIS | Office of Information Services |
| OIS | Organization Information Structure |
| OIT | Office of Industrial Technologies -- Department of Energy |
| OIT | Office of Information Technologies |
| OIT | Office Of Information Technology |
| OIV | Office of International Visitors |
| OJC | Office of Job Corps |
| OJI | On the Job Injury |
| OJI | Outstanding Junior Investigator |
| OJJDP | Office of Juvenile Justice and Delinquency Prevention |
| OJO | Office of Juvenile Offenders |
| OJP | Office of Justice Programs |
| OK | Organized Knowledge |
| OK-8 | Oklahoma State Highway 8 |
| OKE | Okefenokee National Wildlife Refuge |
| OKX | National Weather Service Forecast Office - Upton, NY |