| Acronym | Meaning |
| WCLS | Water Coolant Loop System |
| TP | Test Port |
| VGZ | Velocity To Be Gained (Body Z-Axis) |
| DLS | Dynamic Load Simulator |
| SPIF | Shuttle Payload Integration Facility |
| MEDICS | Medical Information Computer System |
| PLD | Program Listing Document |
| PASS | Primary Avionics Software System |
| LDEF | Long Duration ExPosure Facility |
| CDI | Course Deviation Indicator |