| Acronym | Meaning |
| GCRIO | Global Change Research Information Office |
| VEEH | Variable Electronegativity Extended Hueckel Method |
| IERM | Intermediate Energy R-matrix (theory In Scattering Calcns.) |
| SHR | Selective Hybrid Reduction |
| FMO | Floating Molecular Orbital |
| MCM | Multiconfigurational (variation Of) Moments (for Mo Correlation Diagrams Calcn.) |
| PLT | Lead Lanthanum Titanate |
| NPTN | National Pesticide Telecommunications Network |
| HGNC | HUGO Gene Nomenclature Committee |
| LERAM | Littoral Ecosystem Risk Assessment Model |