| Acronym | Meaning |
| FPT | Finite Perturbation Theory |
| IVC | Inferior Vena Cava |
| CMAS | Completely Mixed Activated Sludge |
| RAIN | Reactions And Intermediates Network |
| CFA | Component Failure Analysis |
| PSID | Photon Stimulated Ion Desorption |
| HPI | Hazard Potential Index |
| PSC | Primary Sclerosing Cholangitis |
| GBH | Gravel Bed Hydroponic System (for Wastewater Treatment) |
| GAGP | Generalized Antisymmetrized Geminal Power (wave Function) |