| Acronym | Meaning |
 | UU | Micromicron |
| TC | Test Conductor (Controller) |
| MPMSE | Multiuse Payload And Mission Support Equipment |
| O&P | Operations And Procedures |
| PCL | Primary Coolant Loop |
| FCOS | Flight Computer Operating System (Orbiter) |
| TPI | Terminal Phase Initiation |
| ECO | Engineering Change Order |
| INV | Inverter |
| SPAN | Spacecraft Analysis |
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