| Acronym | Meaning |
| MMS | Modular Multiband Scanner |
| PSSU | Patch Survey And Switching Unit |
| S/C | Stabilization And Control |
| EDV | Electronic Depressurizing Valve |
| SPCU | Simulation Process Control Unit |
| TPSE | Thermal Protection Subsystem Experiments |
| FLAP | Flight Application Software |
| DC | Design Change Authorization |
| IAS | Integrated Avionics System |
| IGAX | Inner Gimbal Axis |