| Acronym | Meaning |
| RMC | Redundancy Management Control |
| MET | Master Events Timer |
| R | Range Rate |
| PSIA | Pounds Per Square Inch Absolute |
| ECF | Element Charge Factor |
| OC | On Center |
| MTBMA | Mean Time Between Maintenance Action |
| EDC(M) | Electrochemical DePolarized CO (Module) |
| PUV | Propellant Utilization Valve |
| DFRN | Differential |