| Acronym | Meaning |
| AGO | Automatic Geophysical Observatory |
| RCA | Request For Contract Action |
| HESS | Health |
| FO | Orbital Frequency |
| MHS | Message Handling System |
| NAG | Numerical Algorithms Group Inc. |
| APD | Advanced Planning Division |
| GCP | Global Chemistry Program |
| RISE | Radiative Inputs From Sun To Earth |
| CCSM-2 | Community Climate System Model š 2nd Generation |