| Acronym | Meaning |
| PISAM | Photon-induced Scanning Auger Microscope |
| AUSM | Advanced Utility Simulation Model |
| TTU | Transportable Treatment Unit |
| FBA | First Born Approximation |
| NTP | National Toxicology Program |
| CQZ | Constrained Quartet Zeta (basis Set) |
| CC-EH | Coupled-cluster Effective Hamiltonian |
| TZP | Tetragonal Zirconia Polycrystal |
| HSI | Hyperthermal Surface Ionization |
| TON | Turnover No. Of The Reaction |