| Acronym | Meaning |
| PLSS | Portable Life Support Subsystem |
| METVC | Main Engine Thrust Vector |
| VORTAC | Variable Omni Range Tactical (VOR And TACAN) |
| ECC | Engineering Change Control |
| PDL | Program Design Language |
| DE | Design Engineering (KSC Dir.) |
| FBCS | Fixed Base Crew Station (SMS) |
| PIAR | Project Impact Analysis Report |
| REM | Roentgen Equivalent In Man |
| VGOR | Vehicle Ground Operation Requirements |