| Acronym | Meaning |
| OTE | Oxygen Transfer Efficiency (of Aeration Diffusers) |
| TDDB | Time Dependent Dielectric Breakdown |
| TPRRS | Transient Photoinduced Resonant Raman Scattering |
| ALARP | As Low As Reasonably Practicable |
| PMN | Polymorphonuclear Leukocyte |
| L2 | Square Integrable (wave Function) (in Electron-atom Or -mol. Collisions) |
| OOA | Oxygenated Organic Aerosol |
| CAI | Calcium Aluminum Inclusion |
| STBF | Slater-type Basis Function |
| CSDW | Centrifugal Sudden (or Coupled States) Distorted Wave (methodfor Reactive Mol. Collisions) |