| Abbreviation | Definition |
|---|---|
| OPM | Office of Price Management |
| OPP | Office of Polar Programs at the National Science Foundation |
| OPP | Other People's Property |
| OPPM | Office of Planning and Performance Measurement |
| OPQ | Occupational Personality Questionnaire |
| OPR | Official Public Record |
| OPR | Official Public Records |
| OPS | Office of Public Safety |
| OPS | Other Personal Services |
| OPSI | Office of Public Sector Information |
| OPSP | Office of Policy and Strategic Planning |
| OPSV | Office of Protocol and State Visits |
| OPT | Occupational Privilege Tax |
| OPTN | Organ Procurement and Transplantation Network |
| OpUS | Operation United States |
| OPW | Office of Public Works |
| OQA | Office of Quality Audits |
| OQC | Operation Quick Count |
| OQC | Outgoing Quality Control |
| OQD | Office of Quality Development |