| Acronym | Meaning |
| PDSA | Peroxydisulfuric Acid |
| HFBR | High Flux Beam Reactor |
| MWFA | Metalworking Fluids Containing Amines |
| BARF | Best Available Retrofit Facility |
| TREF | Temperature Rising Elution Fractionation |
| RACI | Royal Australian Chem. Institute |
| RFG | Reformulated Gasoline |
| UPA | Unitary-pole Approximation |
| PUHF | (spin)-projected Unrestricted Hartree-Fock |
| AVO | Average Virtual Orbital |