| Acronym | Meaning |
| CAS-SCF | Complete Active Space SCF (a CI-type Method) |
| AAFEB | Anaerobic Attached Film Expanded Bed |
| BSSEC | Basis-set Superposition Error Correction |
| SCFA | Short Chain Fatty Acid |
| OESO | Ordnance Environmental Support Office (Navy) |
| PAB | Pollutant Assessment Branch (US EPA) |
| EASOE | European Arctic Stratospheric Ozone Expt. |
| HAD | High Aluminum Defect |
| SLM | Supported Liquid Membranes |
| SCAG | Southern California Association Of Governments |