| Acronym | Meaning |
| IUGG | International Union Of Geodesy And Geophysics |
| NSSP | National Severe Storms Project |
| IASH | International Association Of Scientific Hydrology |
| HB | Hard Black |
| NCEP | National Centers For Environmental Prediction |
| DCC | Direct Connect Service |
| NTCC | Nimbus Technical Control Center |
| NWSTG | National Weather Service Telecommunications Gateway |
| VORTAC | Very High Frequency (omnirange) TACAN (tactical Air Navigation System) |
| DVM | Dynamic Vegetation Model |