| Acronym | Meaning |
 | HFDS | Hydrogen Fluid Distribution System |
| TU | Transport Unit |
| PS | Power Supply |
| ERRC | Expendability/Recoverability/Repair Capability |
| ROC | Record Of Comments |
| NDTF | Nondestructive Test Facility |
| SHLB | Simulation Hardware Load Boxes |
| ECP | Engineering Change Proposal |
| SAAS | Shuttle Aerosurface Actuator Simulation |
| CRIT | Critical |
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