| Acronym | Meaning |
 | FEC | Forward Events Controller |
| DELTA-T | Difference In Temperature |
| TP | Test Point |
| PAR | Problem Accountability Record |
| POT | Potable |
| PCS | Payload Control Supervisor |
| SSC | Single-Stage Command |
| PPC | Phased Provisioning Code |
| GPSS | General Purpose System Simulator |
| VIC | Visitors Information Center |
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