| Acronym | Meaning |
| CEQ | Council On Environmental Quality |
| GCHAZ | Grain-coarsened Heat-affected Zone |
| EFG | Electric Field Gradient |
| TIME | Test, Inspect, Measure, And Evaluate |
| NPL | National Physical Laboratory |
| AHF | Approximate Hartree-Fock Method |
| IPA | Inverted Perturbation Approach (in Mol. Potential-energy Curves Calcn.) |
| PRCPTS | Primary Reactor Coolant Pump Trip System |
| TBEH | Tight-binding Extended Hueckel (extended Hueckel Tight-binding) |
| ISC3 | Industrial Source Complex Version 3 |