| Acronym | Meaning |
| GSTF | Ground Systems Test Flow |
| ICD | Interface Control Document |
| DPP | Data Requirements And AnalYsis |
| NH | NNH Nominal Heig4t (Adjust Maneuver) |
| GECALL | GCOS Program Element Name |
| TC | Test Conductor (Contractor) |
| CUM | Cumulative |
| GYRO | Gyroscope |
| ITMG | Integrated Thermal/Micrometeoroid Garment |
| DCN | Drawing Change Notice |