| Acronym | Meaning |
| CDS | Control Data Corporation |
| EOI | Earth Orbit Insertion |
| PDCS | Power Distribution And Control System (Subsystem) |
| MIL | Military |
| S/0 | Switchover |
| LPOP | Low Pressure Oxidizer Turbopump |
| RPSF | Rotation |
| GFRP | Graphite Fiber Reinforced Plastics |
| SPE | Solid Polymer Electrolysis |
| DML | Developmental Instrumentation MDM-Left |