| Acronym | Meaning |
 | GCU | Generator Control Unit |
| PSD | RPlanning And Scheduling Document Record |
| HRM | High Rate Multiplexer |
| CDS | Collision Detector System |
| SFD | Crossfeed |
| OF | Orbital Flight |
| CAU | Command Activation Unit |
| SCEA | Signal Conditioning Electronics Assembly |
| CSC | Cosecant COMPuting Amplifier |
| USS | Utility Support Structure |
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