| Acronym | Meaning |
| UCR | Unsatisfactory Condition Report |
| I | DAC Integrated Digital-Analog Converter |
| DUR | Duration |
| MSD | MARS Supplemental Data |
| ETLOW | External Tank Lift-Off Weight |
| ESS | Experiment Subsystem Simulator |
| DC | DCASData Collection And Analysis System |
| DAS | Data Acquisition System |
| TCS | Technical Change Summary |
| TIROS | ToPographical Infrared Operations Satellite |