| Acronym | Meaning |
 | CTS | Ci'mPuter Test Set |
| SIMS | Shuttle Imaging Microwave System |
| LPLWS | Launch Pad Lightning Warning System |
| T/C | Termination Check |
| RT | Real Time (R/T Preferred) |
| NMI | NASA Management Instruction |
| MVS | Middle Value Select |
| VDD | Version Description Document |
| VCC | Verification Code Counter |
| FAR | Federal Aviation Regulation |
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