| Acronym | Meaning |
| OPLC | Overpressured Layer Chromatography |
| CEY | Conversion Electron Yield |
| FNO | Frozen Natural Orbital |
| ALE | Atmospheric Lifetime Experiment |
| ETEC | Enterotoxigenic Escherichia Coli |
| STODI | Slater-type Orbital-point Dipole Interaction (in Mol. Polarizability Calcns.) |
| CAL | Computer Aided Learning |
| EWPCA | European Water Pollution Control Association |
| CWS | Community Water System |
| COF | Coefficient Of Friction |