| Abbreviation | Definition |
|---|---|
| OPCEN | OPerations CENter |
| OPCF | Operations Career Field |
| OPCOM | OPerational COMmand |
| OPCOMM | OPerator COMMunications |
| OPCON | Operating Command Authority |
| OPCON | OPerational COMmand |
| OPCON | OPerational CONtrol |
| OPCW | Organisation for Prohibition of Chemical Weapons |
| OPDEC | Operational Deception |
| OPDEP | OPerations DEPuty |
| OPDOC | OPerational DOCumentation |
| OPDS | Offshore Petroleum Discharge System |
| OPDW | Objective Personal Defense Weapon |
| OPE | Operational Preparation of The Environment |
| OPELINT | Operational Electronic Intelligence |
| OPERREQ | Operator Requests |
| OPERRESP | Operator Response |
| OPF | Official Personnel File |
| OPFAC | Operations (or Operational) Facility |
| OPFOR | Opposing Force |