| Acronym | Meaning |
 | PIA | Project Impact Analysis |
| T | Test |
| SPC | Stored Program Command |
| STS | Space Transportation System |
| MSCR | Measurement/Stimuli Change Request |
| D&CS | Display And Controls Subsystem |
| SDM | Subsystem Design Manuals |
| MI | Management Information |
| DWS | Disaster Warning Satellite |
| SEC | Source Evaluation Committee |
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