| Acronym | Meaning |
| PLUM | Payload Umbilical Mast |
| HSS | High Speed Reader |
| VTM | Vibration Test Module |
| REIL | Runway End Identification Lights |
| D/L | Data Link |
| SPAF | Simulation Processor And Formatter |
| CCS | Contamination Control System |
| BCH | Bose-Chaudhuri-Hocquenghen (Computer Code) |
| MSC | Master Sequence Controller |
| CPG | Change Planning Group |