| Acronym | Meaning |
| CSIU | Core Segment Interface Unit |
| CRISP | Computer Resources Integrated Support Plan |
| TWTA | Traveling Wave Tube Amplifier |
| DMG | Data Management Group |
| EL | Environmental Impact |
| DISCH | Discharge |
| TGO | Time To Go |
| SD | LSoftware Development Laboratory |
| LVLH | Local Vertical/local Horizontal |
| CTA | Computer Technology Associates (GSFC) |