| Acronym | Meaning |
 | IUS | Inertial UPper Stage (was Interim UPper Stage) |
| STE | System Test Engineer |
| TPSE | Thermal Protection Subsystem Experiments |
| DFCS | Digital Flight Control Software (System) |
| VCO | Voltage Controlled Oscillator (Oscillation) |
| NZ | Normal Acceleration |
| HFCT | Hydraulic Flight Control Test |
| VAR | Verification Analysis Report |
| CAR | Configuration And Acceptance Review |
| LPD | Landing Point Designator |
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