| Acronym | Meaning |
| LEEM | Low-energy Electron Microscopy |
| LCLO | Linear Combination Of Localized Orbitals |
| PHEMT | Pseudomorphic High Electron Mobility Transistor |
| QRF | Quadratic Response Function (a Quantum Propagator) |
| LOX | Liquid Oxygen |
| CAS-CI | Complete Active Space-configuration Interaction |
| PT2F | Second-order Perturbation Theory (with) Fock (matrix) |
| GLAO | Generalized Localized Ao |
| GWKB | Generalized Wentzel-Kramers-Brillouin |
| LCBO | Linear Combination Of Bloch Orbital |