| Acronym | Meaning |
| S&AD | Science And Applications Directorate |
| MSI | Maintenance Significant Items |
| DERIGID | Derigidize |
| PVT | Pressure/Volume/Temperature |
| REINIT | Reinitialize |
| PF | PayloadFunction |
| ESMC | ETR |
| OMRSD | O&M Requirements And Specifications Documentation |
| SPA | Signal Processor Assembly |
| E&D | Engineering And DeveloPment Directorate (JSC) |