| Acronym | Meaning |
| NARSTO | North American Research Strategy For Tropospheric Ozone |
| CASSS | California Separation Science Society |
| REIMEP | Regulation European Interlab. Measurement Evaluation Program |
| LOVA | Lowest-order Variational Approxn. (for Electron-phonon Interactions In Metals) |
| GBCD | Grain Boundary Character Distribution |
| MES | Methyl Ester Sulfonates (surfactants) |
| COMA | Cometary Mass Analyzer |
| PTR-MS | Proton Transfer Reaction-mass Spectrometry |
| CSF | Configuration Spin Function (a Wave Function) |
| MPF | Maturation-promoting Factor |