| Acronym | Meaning |
| RDEQ | Reduced Dimensionality Exact Quantum (method For Reactive Scattering) |
| OBK2 | Second-order Oppenheimer-Brinkman-Kramers |
| BCUT | Burden CAS And University Of Texas |
| HFS | Hartree Fock Slater |
| ENSO | El Nino Southern Oscillation |
| EFC | European Federation Of Corrosion |
| SIM | Selected Ion Monitoring |
| CAB | Core And Bond (molecular Partitioning Method) |
| CAT | Computer-aided Tomography |
| SCTB | Self-consistent Tight-binding (in Electronic Structure) |