| Acronym | Meaning |
| CCR/IDA | Center For Communications Research/Institute For Defense Analyses |
| ARAC | Atmospheric Release Advisory Capability |
| UMIST | University Of Manchester Institute Of Science And Technology |
| PCNFS | Personal Computer Network File System |
| WGNE | Working Group On Numerical Experimentation |
| NWS | National Weather Service |
| APEN | Air Pollution Emissions Notice |
| KP | Geomagnetic Planetary Index |
| GDS | Global Dynamics Section |
| IIASA | International Institute For Applied Systems Analysis |