| Acronym | Meaning |
 | PLRD | Payload Requirements Document |
| LFOP | Landing And Ferry Operations Panel |
| HPR | Hydrogen Pressure Regulator |
| SP-FGS | Flight And Ground Systems Office (KSC Shuttle) |
| RHS | Rocketdyne Hybrid Simulator |
| STDY | Steady |
| ELDISC | Electrical Disconnect |
| AES | Atmospheric Exchange System |
| UPS | Uninterruptible Power System |
| ORSDI | Oak Ridge Selective Dissemination Of Information |
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