| Acronym | Meaning |
| WAS | Waste Activated Sludge |
| CEPA-SD | Coupled-electron-pair Approxn. (with) Single (and) Double Excitations |
| MULAP | Mulliken Approximation |
| SF-PNM | Step Function Perturbative Numerical Method |
| NDSC | Network For The Detection Of Stratospheric Change |
| CDW | Continuum Distorted Wave |
| MMA | Methyl Methacrylate |
| GDMS | Glow Discharge Mass Spectrometry |
| NVH | Noise, Vibration, And Harshness |
| POSSUM | Protein Online Substructure Searching - Ullman Method |