| Acronym | Meaning |
| LT2ESWTR | Long-Term 2 Enhanced Surface Water Treatment Rule [of US EPA] |
| ATEM | Analytical Transmission Electron Microscopy |
| EIL | Environmental Impairment Liability |
| GAMESS | General Atomic And Molecular Electronic Structure System |
| IGOR | Interactive Generation Of Organic Reactions |
| FMIT | Fusion Materials Irradiation Test |
| RZWQM | Root Zone Water Quality Model |
| WPAC | Working Party On Analytical Chemistry |
| FTMS | Fourier Transform Mass Spectrometry |
| MECA | Multiple Excitation Collisional Activation |