| Acronym | Meaning |
| SNIF | Site-specific Natural Isotope Fractionation |
| CWF | Coal-water Fuel |
| PNH | Paroxysmal Nocturnal Hemoglobinuria |
| OSWER | Office Of Solid Waste And Emergency Response (USEPA) |
| DSA | Dimensionally Stable Anode |
| HRAC | Herbicide Resistance Action Committee |
| IEH | Intermediate Effective Hamiltonian |
| MTFE | Mercury Thin-film Electrode |
| FCP | Function Counterpoise (method For Eliminating Basis Set Superposition Error) |
| DICD | Dispersion-induced Circular Dichroism |