| Acronym | Meaning |
| OVLD | Overload |
| ERSIR | Earth Resources Shuttle Imaging Radar |
| P&M | Phase Modulation (Modulated) |
| ATMOS | Atmospheric Trace Molecule Spectroscopy |
| RCSC | Reaction Control Subsystem Controller |
| TGT | Target |
| PDP | Preliminary Definition Plan |
| BS | Block Specification |
| HGR&SPTFAC | Hangar And Support Facility |
| DAB | Data Acquisition Bus |