| Acronym | Meaning |
| IUS | Inertial UPper Stage (was Interim UPper Stage) |
| BP | Cycle |
| SPART | Space ResearchandTechnology |
| UDMH/H | Unsymmetrical Dimethylhydrazine Hydrazine Blend |
| EVS | Equipment VisibilitY System |
| DDU | Decommutator Distribution Unit |
| COAS | Crew(man) Optical Alignment Sight |
| RSD | Requirements And Specifications Document |
| SPN | Shuttle Project Notice (KSC) |
| PTC | Passive Thermal Control |