| Acronym | Meaning |
 | ORB | 1 -g Orbiter One-g (trainer) |
| PCM | Punch Card Machine |
| MSLD | Mass Spectrometer Leak Detector |
| TPUN | Test Procedure Update Notice |
| PAE | Problem Assessment Engineer |
| OBS | Operational Bioinstrumentation System |
| VIDD | Vertical Interval Data Detector |
| MOD | Modulation |
| DEORB | Deorbit |
| MON | Monitor |
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