| Acronym | Meaning |
| ANSS | American Nature Study Society |
| SERI | Solar Energy Research Institute |
| NESC | National Energy Software Corporation |
| HPO | High Performance Option |
| USGCRP | United States Global Change Research Program |
| FEWS | Follow-on Early Warning System |
| OAR | Oceanic And Atmospheric Research |
| CALCOMP | California Computer Products |
| EPOP | European Polar Orbiting Platform |
| PFA | Prime Factor Algorithm |