| Abbreviation | Definition |
|---|---|
| OML | Orbiter Mold Line |
| OML | Outer Mold Line |
| OML | Outside Mold Line |
| OMM | Orbiter Major Modification |
| OMMH | Orbiter Maintenance Man-Hours |
| OMNI | Omnidirectional |
| OMNI | Omni-Range |
| OMP | Operations and Maintenance Plan |
| OMPR | Operational Maintainability Problem Reporting |
| OMPT | Observed Mass Point Trajectory |
| OMR | Operations and Maintenance Requirements |
| OMR | Operations Management Room |
| OMR | Orbiter Management Review |
| OMRB | Operating Material Review Board |
| OMRC | Operational Maintenance Requirements Catalog |
| OMRF | Orbiter Modification and Refurbishment Facility |
| OMRP | Operations and Maintenance Requirements Plan |
| OMRS | Operations and Maintenance Requirements Specification |
| OMRSD | O&M Requirements and Specification Documentation |
| OMRSD | Operational Maintainability Reporting Systems Document |