| Acronym | Meaning |
 | HDRSS | High Data Rate Storage System |
| DEU | Display Electronics Unit |
| QPSK | Quadrature Phase Shift Key |
| ORI | Operational Readiness Inspection |
| EPS | Electrical Power System (Subsystem) |
| RHU | Radioisotope Heater Unit |
| FSGS | Flare/Shallow Glide Slope |
| RTS | Real-Time Supply |
| ELV | Expendable Launch Vehicle |
| EED | Electro (Electrical) Explosive Device |
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