| Acronym | Meaning |
 | PTC | Portable Temperature Controller |
| CWEU | Caution And Warning Electronics Unit |
| SMTAS | Shuttle Model Test And Analysis System |
| PI | Payload Interrogator |
| NORAD | North American Air Defense Command |
| CAM | Computer Annunciation Matrix |
| PDM | Pulse Duration Modulation |
| GM | Geometric Mean |
| TMI | Technical Management Items |
| HIRAP | High-resolution Accelerometer Package |
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