| Acronym | Meaning |
| RACS | Remote Automatic Calibration System |
| SSUSP | Spinning Solid Upper Stage Project |
| VTS | Vertical Test Site |
| PMI | Preventive Maintenance Instruction |
| NMO | Normal Manual Operation |
| ORDC | Orbiter Data Reduction Center |
| VRL | Vertical Recovery Line |
| SPTD | Supplemental Provisioning Technical Documentation |
| POP | Preflight Operations Procedures |
| ROTI | Recording Optical Tracking Instrument |