| Acronym | Meaning |
| PHMC | Probe Heater Motor Controller |
| MFE | Mid Frequency Executive |
| OPR | Oxygen Pressure Regulator |
| PM | Phase Modulation |
| OMRB | Operating Material Review Board |
| DEIS | Design Engineering Inspection Simulation |
| LSM | ILogistics Support Management Information |
| RBE | Radiation Biological Effectiveness |
| K/S | Kick Stage |
| U/W | Used With |