| Acronym | Meaning |
| WAXS | Wide-angle X-ray Scattering |
| CAP | Complex Absorbing Potential |
| BSO | Bismuth Silicon Oxide |
| OMO | Orthonormal Molecular Orbital |
| HTTP | Hypertext Transfer Protocol |
| IJC | International Joint Commission |
| LITD | Lased Induced Thermal Desorption |
| MECI | Monoexcited Configuration Interaction |
| EMS | Electron Momentum Spectroscopy |
| CCSDTQP | CCSDTQ (and) Pentuple (excitations) |