| Acronym | Meaning |
| PFE | Pressurized Fluid Extraction |
| LCHAO | Linear Combination Of Hybrid Atomic Orbitals |
| FTM | Fault Tree Model |
| R-GVB | Resonating-generalized Valence Bond (wave Function) |
| PPM | Parts Per Million |
| ESE MO | Essential-structure-elements Molecular Orbital |
| BAGI | Backscatter Absorption Gas Imaging |
| CRABP | Cellular Retinoic Acid-binding Protein |
| DPSS | Diode-pumped Solid-state |
| SIS | Stepwise Isothermal Segregation |