| Acronym | Meaning |
| VMR | Vol. Mixing Ratio |
| CAL | Computer Aided Learning |
| UHFS | Unrestricted Hartree-Fock-slater |
| CRTA | Controlled Rate Thermal Analysis |
| SSER | Spinless Salpeter Equation (with) Retardation |
| FWE | Faddeev-Watson Expansion (for T-operator In Atomic Collisions) |
| CPM | Counts Per Minute |
| IMT | Ion Microtomography |
| SIPOS | Semi-insulating Polycrystalline Silicon |
| SMILES | Simplified Molecular Input Line Entry System |