| Acronym | Meaning |
| METAALICUS | Mercury Experiment To Assess Atmospheric Loading In Canada And The US |
| UARP | Upper Atmospheric Research Program |
| DIA | Drug Information Association |
| LIESST | Light-induced Excited Spin State Trapping |
| MCPSAG | Marcus-Coltrin-Path Semiclassical Adiabatic Ground-state (transmission Coeffs.) |
| TCA | Traveling-cluster Approximation (a Generalization Of CPA For Electronic-structure Of Alloys) |
| FPM | Fine Particulate Matter |
| CAES | Compressed Air Energy Storage |
| MSR | Mammalian Selectivity Ratio |
| AS | Auger Spectroscopy |