| Acronym | Meaning |
| HLPSA | Hazardous Liquid Pipeline Safety Act |
| EFG | Electric Field Gradient |
| CCSDT | Coupled Cluster With Single |
| SROS | Spin-restricted Open Shell |
| SOD | Sediment Oxygen Demand |
| OPM | Optimized Potential Model |
| HADES | High Activity Disposal Exptl. Site [for Radioactive Waste] |
| RSCA | Relativistic Semiclassical Approximation (for At. Scattering) |
| PIMBE | Plasma-induced Molecular-beam Epitaxy |
| GMISS | Gridded Model Information Support System |