| Acronym | Meaning |
| TBTE | Tight-binding Total-energy (calcn. Method) |
| QAMB | Quality Assurance Materials Bank (USEPA) |
| IUPHAR | International Union Of Pharmacology |
| BOW | Bond-order Wave |
| NDBEPR | Nitrification-denitrification Biological Excess Phosphorus Removal |
| FMVCP | Federal Motor Vehicle Control Program |
| IGC | Inverse Gas Chromatog. |
| REX | Reactive Extrusion |
| MEXA | Multiple-energy X-ray Absorptiometry |
| ALAD | Delta-aminolevulinic Acid Dehydratase (lead Poisoning Indicator) |