| Acronym | Meaning |
| GGEM | Gravity Gradiometer Explore Mission |
| IASH | International Association Of Scientific Hydrology |
| AKP | Atmospheric Kinetics Project |
| AQCA | Air Quality Control Act |
| ACD | Advanced Conceptual Design |
| VMS | Virtual Memory Systems |
| ACL | Alternative Concentration Level/limit |
| LAPS | Local Analysis And Prediction System |
| MARI | Middle Atmosphere Research Initiative |
| DSN | Deep Space Network |