| Acronym | Meaning |
 | CDU | Control And Display Unit |
| PMF | Performance Monitor (Monitoring) Function |
| SSA | 1/0 GCOS Program Element Name |
| SORTIE | Short Term Mission |
| TFU | Test Facility Utilization |
| MSS | Mission Specialist Station |
| OD | Operational Downlink/Downlist |
| SDCS | SAIL Data Communications SYstem |
| VHF/AM | Very High Frequency Amplitude Modulator |
| CNTRL | Control |
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