| Acronym | Meaning |
| XBIS | X-ray Bremsstrahlung Isochromat Spectroscopy |
| RAINBOWS | Reduced And INternally Biased Oxide Wafers |
| FTC | Federal Trade Commission |
| SCCT | Semiclassical Complex Trajectory |
| DHS | Dynamic Headspace |
| OBD | On-board Diagnosis |
| RMTO | Relativistic Muffin-tin Orbital |
| CVTST | Canonical Variational Transition-state Theory |
| SPIES | Surface Penning Ionization Electron Spectroscopy |
| HSCR | Hirschsprung Disease |