| Acronym | Meaning |
| ETS | External Transcribed Spacer |
| PTM | Perturbation Trajectory Method (in Gas-surface Collision Dynamics) |
| IADN | Integrated Atmospheric Deposition Network |
| WEF | Water Environment Federation (formerly WPCF) |
| IDSA | Infectious Diseases Society Of America |
| FEV | Forced Expiratory Volume (measure Of Lung Function) |
| FQO | Forced Quantum Oscillator Method |
| RTDF | Remediation Technologies Development Forum |
| CCDIS | Charge-coupled Device Imaging Spectrometer |
| EVOH | Ethylene Vinyl Alcohol |