| Acronym | Meaning |
 | ECS | Environmental Control System |
| SOFI | Spray-on Foam Insulation |
| ISM | InterStellar Medium |
| FRF | Flight Readiness Firing |
| PDRS | Payload Deployment And Retrieval System |
| HPOTP | High Pressure Oxidizer Turbopump |
| TSS | Targeted Search System / Tethered Satellite System |
| ENSO | El Nino/Southern Oscillation |
| DCA | Defense Communications Agency |
| VHF | Very High Frequency |
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