| Acronym | Meaning |
| IMS | Ion Mobility Spectrometry |
| MCL | Maximum Contaminant Level |
| NPRI | National Pollutant Release Inventory |
| ANPRM | Advance Notice Of Proposed Rulemaking |
| NTI | Negative Thermal Ionization (for Mass Spectrometry) |
| LIPOD | Laser Induced Photochemical Oxidative Destruction Process |
| IPDI | Isophorone Diisocyanate |
| APWP | Apparent Polar Wander Path |
| PIMD | Path Integral Molecular Dynamics |
| TIG | Tungsten Inert Gas (welding) |