| Acronym | Meaning |
 | TFCS | Triplex Flight Control System (Subsystem) |
| TEMS | Transport Environment Monitoring System |
| NOC | Not Otherwise Coded |
| SR | Shift Register |
| SSMECA | Space Shuttle Main Engine Controller Assembly |
| RTCC | Real-Time Computer Command (UPlink) |
| FPS | Forward Power Supply |
| M | Meter |
| OW | Optical Window |
| AMSU | Advanced Microwave Sounding Unit |
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