| Acronym | Meaning |
| RFD | Reference Dose |
| ALEXIS | Array Of Low Energy X-Ray Imaging Sensors |
| PCCS | Phase-corrected Coupled-states (approxn. For Scattering Calcns.) |
| CFRP | Carbon Fiber Reinforced Plastic |
| SCI | Super Configuration Interaction |
| CRU | Constitutional Repeating Unit |
| PNP | Purine Nucleoside Phosphorylase |
| IWMIS | INEL Industrial Waste Management Information System |
| RMPROP | R-matrix Propagation |
| VPC | Vapor-phase Chromatography |