| Acronym | Meaning |
| STM | Symptom Tree Model |
| LEED | Low-energy Electron Diffraction |
| AM1 | Austin Model 1 |
| HDP | High-density Plasma |
| MNDOD | Modified Neglect Of Diatomic Overlap With D At. Orbitals |
| FEEO | Fuel Efficient Engine Operation |
| UMIX | User-Manufacturer Information EXchange |
| PIXET | Proton Induced X-ray Emission Tomography |
| CC-LRT | Coupled-cluster(-based) Linear Response Theory |
| BTV | Breakthrough Volume (sorption Capacity Measurement) |