| Acronym | Meaning |
 | EMCD | Electro-Mechanical Control Diagram |
| SS | Single Sideband |
| OA | Operational Aft (DSC Or MOM) |
| FSK | Frequency Shift Keyed (Keying) |
| ORB | 1 -g Orbiter One-g (trainer) |
| MDS | Minimum Discernible System |
| GTI | Ground Test Instrumentation |
| FOV | Field Of View (Vision) |
| CKAFS | Cape Kennedy Air Force Station (Changed To CCAFS) |
| EPG | Electrical Power Generator |
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