| Acronym | Meaning |
| RFT | Respirator Fit Test |
| QPLDA | Quasiparticle Local-density Approxn. |
| ERA | Expedited Removal Action |
| CCPPA | Coupled-cluster Polarization-propagator Approxn. |
| AM | Arithmetic Mean |
| BRAVO | Big Bend Regional Aerosol And Visibility Observational Study |
| CWA | Chemical Warfare Agent |
| ASHRAE | American Society Of Heating |
| FTS | Fourier Transform Spectroscopy |
| SAR | Simulated Acidic Rain |