| Acronym | Meaning |
| WWEMA | Waste And Wastewater Equipment Manufacturers Association |
| MSX | Midcourse Space Experiment |
| HFRP | Hybrid Fiber Reinforced Plastics |
| CMAQ | Community Multiscale Air Quality |
| CPSS | Chemist's Personal Software Series |
| SIDMS | Speciated Isotope Dilution Mass Spectrometry |
| INDA | Investigational New Drug Application |
| MIMS | Membrane Introduction Mass Spectrometry |
| OAW | Oxyacetylene Welding |
| AAR | Accumulation-area Ratio (for Glaciers) |