| Acronym | Meaning |
 | RPTA | Rudder Pedal Transducer Assembly |
| IVSI | Instantaneous Vertical Speed Indicator |
| DCS | Data Control System |
| PBD | Payload Bay Door |
| RE&T | Research Engineering And Test |
| VA | Vibro-Acoustic Test |
| EIS | Electrical Integration SYstem |
| NI | NNi Nickel |
| FMOF | First Manned Orbital Flight |
| DEC | Declination |
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