| Acronym | Meaning |
| MTFE | Mercury Thin-film Electrode |
| PML | Polymer Multi Layer |
| TEDS | Timed Exposure Diffusive Sampler (for Air Pollution) |
| DWC | Deasphalted Whole Crude |
| BCT | Best Conventional Technology |
| FEM | Free Electron Model |
| FIMDA | Fluorescence Intensity Multiple Distributions Analysis |
| DIHEN | Direct Injection High Efficiency Nebulizer |
| IX | Ion Exchange |
| SCCSA | Self-consistent Central-site Approxn. (for D.-of-states) |