| Acronym | Meaning |
| PQC | Piezoelectric Quartz Crystal |
| LHON | Leber's Hereditary Optic Neuropathy |
| FWM | Four-wave Mixing |
| SF-PNM | Step Function Perturbative Numerical Method |
| ECP | Eosinophil Cationic Protein |
| FEGE | Free Electron Gas Exchange Approximation |
| IFANT | International Foundation For The Advancement Of Nondestructive Testing |
| EBFRIP | European Brominated Flame Retardant Industry Panel |
| HLB | Hydrophilic-lipophilic Balance (of Surfactants) |
| TLM | Transmission Line Method |