| Acronym | Meaning |
| PIES | Partial Integration Exterior Scaling (in Calcns. On Resonance Positions And Lifetimes |
| GCFR | Gas-cooled Fast Reactor |
| MCHF | Multiconfiguration Hartree-Fock |
| CEA | Cost-Effectiveness Analysis |
| RRDE | Rotating Ring Disk Electrode |
| CVM | Cluster Variation Method (in Calcns. On Semiconductors) |
| SOMO | Singly Occupied Molecular Orbital |
| COP | Cyclic Olefin Polymers |
| HCS | Hazard Communication Standard |
| IALLW-CAT | Isotope Area Liquid Low-level Waste Collection And Transfer |