| Acronym | Meaning |
| NCPM | Noncritical Phase-matching |
| PPT | Parts Per Trillion |
| TNLCD | Twisted Nematic Liquid Crystal Display |
| BQMCT | Basis Quantum Monte-Carlo Theory (for Many Electron Systems) |
| PSD | Photon Stimulated Desorption |
| CBER | Center For Biologics Evaluation And Research |
| DAB | Dipole Adapted Basis (wave Function) |
| OVC | Optimized Valence Configuration |
| PES | Photoelectron Spectroscopy |
| FO-NACME | First-order Nonadiabatic Coupling Matrix Elements |