| Acronym | Meaning |
 | LPW | Lumens Per Watt |
| FID | Flight Implementation Directive |
| CRT | Cathode Ray Tube |
| EVLSS | Extravehicular Life Support System |
| SAM | SYstem Activation And Monitoring |
| HYPACE | Hybrid Programmable Attitude Control Electronics |
| BTU | Bus Terminal Unit |
| NZB | Non Zero Binary |
| OPSS | Orbital Propellant Storage Subsystem |
| MIL | GSFC Spaceflight Tracking And Data Network Station |
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