| Acronym | Meaning |
| ESMC | ETR |
| TC | Thrust Chamber |
| MDC | Mission Duty Cycle |
| SOP | Standard Operating Procedure |
| RTU | Renote Terminal Unit |
| NGM | NNGM Nitrogen Generation Module |
| RBDE | Radar Bright Display Equipment |
| TVC | Thrust Vector Control |
| M/R | Mixture Ratio (Fuel To Oxidizer) |
| SPAD | Shuttle Payload Accommodation Document |