| Acronym | Meaning |
 | PBPS | Post-Boost Propulsion System(s) |
| GVTA | Ground Vibration Test Article |
| LC | Interim Change |
| ISL | Inertial Systems Laboratory |
| MCVP | Materials Control And Verification Program |
| PEFO | Payload Effects Follow-on Study |
| LH2 | Liquid Hydrogen |
| MCIU | Master Control And Interface Unit |
| PA | Power Amplifier |
| UNIV | Universal |
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