| Acronym | Meaning |
| PK/PK | Peak To Peak |
| CIR | Configuration Inspection Report |
| V-A | Vibro-Acoustic |
| NSTL | National Space Technology Laboratory (was MTF) |
| LAPS | Left Aft Propulsion System (Subsystem) |
| ESTA | Escape System Test Article |
| M | LcsManagement Information And Control System |
| OVS | Operational Voice System |
| FL | Flowline |
| LSB | Lower Side Band |