| Acronym | Meaning |
| REX | Relativistically Parametrized Extended Hueckel |
| BPC | Bonded-phase Chromatography |
| PCD | Programmed Cell Death |
| APIG | Antisymmetrized Product (of) Identical Geminals |
| ASM | American Society For Metals |
| MOV | Motor Operated Valve |
| ACWM | Asbestos Containing Waste Material |
| AIGER | American Industry Government Emissions Research Consortium |
| BART | Best Available Retrofit Technology |
| MDQ | Minimum Detectable Quantity |