| Abbreviation | Definition |
|---|---|
| OCR | Out of Cycle Review |
| OCS | Office of Community Services |
| OCSE | Office of Child Support Enforcement |
| OCSIT | Office of Citizen Services and Innovative Technologies |
| OCSP | Offshore Contract Staff Program |
| OD | Officer of the Day |
| OD | Oil Dependent |
| OD | Organization Development |
| ODA | Office of Disability Accommodation |
| ODA | Official Development Assistance |
| ODA | Overseas Development Administration |
| ODB | Occupational Database |
| ODEP | Office of Disability Employment Policy |
| ODG | Official Disability Guidelines |
| ODIC | Office of Disability Integration and Coordination |
| ODJC | Old Dominion Job Corps |
| ODNI | Office of the Director of National Intelligence |
| ODPEM | Office of Disaster Preparedness and Emergency Management |
| ODPHP | Office of Disease Prevention and Health Promotion |
| ODR | Online Dispute Resolution |