| Acronym | Meaning |
| PIPECO | Photoion-photoelectron Coincidence Spectroscopy |
| WAND | Waste Acceptance For Nonradioactive Disposal |
| FEMO | Free-electron Molecular Orbital |
| CCDW | Commensurate Charge-density Wave |
| HMSA | Hybrid Mean Spherical Approximation |
| MCT | Mercury Cadmium Telluride |
| HORSES | Higher-order Raman Spectral Excitation Studies |
| PKR | Protein Kinase R |
| OB/OD | Open Burn/open Detonation |
| EUSO | Extreme Universe Space Observatory |