| Acronym | Meaning |
| MULAP | Mulliken Approximation |
| ATERIS | Air Toxics Exposure And Risk Information System |
| CSA | Canadian Standards Authority |
| RESIS | Receptor Site Interaction Simulation |
| UARS | Upper Atmosphere Research Satellite |
| PDLC | Polymer-dispersed Liquid Crystal |
| AMI | Active Microwave Instrument |
| PLDA | Piecewise Linear Discriminant Analysis |
| MEM | Maximum Entropy Method |
| WDS | Wavelength-dispersive Spectrometry |