| Acronym | Meaning |
| HNF | Hepatocyte Nuclear Factor |
| CPQRA | Chemical Process Quantitative Risk Assessment |
| SGBD | Steam Generator Blowdown |
| BAW | Bond-order Alternation Wave (mol. Orbital) |
| PGAA | Prompt Gamma-ray Activation Analysis |
| PRP | Prion Protein |
| GEA | Gradient-expansion Approxn. (in Exchange-energy Calcns.) |
| FWPCA | Federal Water Pollution Control Administration |
| PIMIA | Potentiometric Ionophore-modulation Immunoassay |
| HFRR | High Frequency Reciprocating Rig |