| Acronym | Meaning |
 | PPS | Pneumatic Power Subsystem |
| EXCH | Exchange |
| SPCC | STS Processing Control Center |
| RFO | Request For Order |
| EOP | Experiments Of Opportunity |
| PFS | Percent Full Scale |
| STA | RScientific And Technical Report |
| OMS | Orbital Maneuvering Subsystem |
| OTLC | Orbiter Timeline Constraints |
| R | BARRadius Vector Axis |
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