| Acronym | Meaning |
 | FC | Flight Control |
| RETRO | Retro Controller (NASA) |
| CAL | Calibrate |
| SPA | Steering Position Amplifier |
| NSA | National Standards Association |
| HDP | Holddown Post |
| RADAR | Radio Detecting And Ranging |
| EOP | Experiments Of Opportunity |
| FFC | Final Flight Certification |
| TA | Test Article |
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