| Acronym | Meaning |
| CWS | Community Water System |
| ESIG | European Solvents Industry Group |
| CP-TAPF | Cross-polarization Using Time-averaged Precession Frequency |
| MCQR | Multiconfigurational Quadratic Response |
| PIA | Peaking Impulse Approxn. (for Electron-exchange Collisions) |
| MEPED | Medium Energy Proton & Electron Detector |
| RESOLVE | Research On Operations Limiting Visual Extinction |
| EPM | Electron Probe Microscopy |
| RRC | Regional Response Center |
| MRNA | Messenger Ribonucleic Acid |