| Acronym | Meaning |
| MRCR | Measurement Requirement Change Request |
| LH2 | Liquid Hydrogen |
| RPLC | Replace |
| IPS | I RTCMIntegrated Real-Time Contamination Monitor |
| POST | Program To OPtimize Simulated Trajectories |
| PRC | PlanningResearchCorporation |
| IB | Instruction Book |
| MA | Master Alarm |
| IAD | Interface Agreement Document |
| JRB | Joint Review Board |