| Acronym | Meaning |
| FRED | Flexible Regional Emissions Data System |
| RR | Round Robin (test) |
| LZC | Liquid Zone Control (in Alloy Processing) |
| OCBSE | Orthogonality Constrained Basis Set Expansion Prodedure |
| BEA | Binary Encounter Approximation |
| MAM | Modified Atoms (in) Molecules |
| WQMSGL | Water Quality Modeling System For The Great Lakes |
| DHS | Department Of Health Services |
| CIRA | COSPAR International Reference Atmosphere |
| MEBS | Medium Energy Backscattering Spectrometry |