| Acronym | Meaning |
| CEY | Conversion Electron Yield |
| PMO | Perturbed Morse Oscillator (model Potential) |
| EMAS | Electron Microprobe Auger Spectroscopy |
| CHW | Coherent Hole Wave (quantum Excitations In Solids) |
| ARRP | Ammonia Removal And Recovery Process |
| ZPL | Zero-phonon Line |
| NDF | Neutral Detergent Fiber |
| ND | Nitrification Denitrification |
| SINDO | Symmetrically Orthogonalized Intermediate Neglect Of Differential Overlap |
| LHDC | Lube Hydrocracking Distillate Catalyst |