| Acronym | Meaning |
 | EXTD | Extend |
| PLUM | Payload Umbilical Mast |
| RTLS | Return To Launch Site |
| MMDB | Master Measurement Data Base |
| PCRB | Program Change Review Board (RI Launch |
| FED | Flight Events Demonstration |
| GPCB | GOAL Program Control Block |
| CWE | Caution And Warning Electronics |
| CVT | Communications Vector Table |
| LO | Local Oscillator |
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