| Acronym | Meaning |
| UID | User Identification |
| Z-R | Relationship |
| BPSG | Budget Planning And Systems Group |
| MKS | Meter-kilogram-second System Of Measurement |
| NICI | Negative Ion Chemical Ionization |
| EED | Exposure Evaluation Division |
| GPS/MET | GPS Meteorological Satellite |
| TD | Thermal Dissociation |
| MAR | Modernization And Associated Restructing |
| IMAGES | Intermediate Model For The Annual And Global Evolution Of Interactive Systems |