| Acronym | Meaning |
| WWM | Wigner-Weyl-Moyal (formalism In Quantum Mechanics) |
| PPHM | Parts Per Hundred Million |
| EFRTS | External-floating-roof Tanks |
| MIH | Method Of Intermediate Hamiltonians |
| DWA | Distorted Wave Approximation |
| THMFP | Trihalomethane Formation Potential |
| DAF | Decay-accelerating Factor |
| CSO | Combined Sewage Overflow(s) |
| QBO | Quasi-biennial Oscillation (atm.) |
| DRIE | Deep Reactive Ion Etching |