| Acronym | Meaning |
| SCIA | Semiclassical Impulse Approxn. |
| ORV | Optical Retardation Velocity |
| NDBEPR | Nitrification-denitrification Biological Excess Phosphorus Removal |
| GVB-MDSA | Generalized Valence Bond-molecular Dynamics Simulated Annealing |
| BATS | Biosphere-Atmosphere Transfer Scheme |
| PACT | Powdered Activated Carbon Treatment |
| PFI | Pulsed Field Ionization |
| HID | High Intensity Discharge |
| FACE | Free Air Controlled Enrichment Program |
| SOM | Scanning Optical Microscope |