| Acronym | Meaning |
| TST | Transition State Theory |
| LNO | Localized Natural Spin Orbital |
| ADH | Alcohol Dehydrogenase (reg: 9031-72-5) |
| EAAPS | Electron-excited Auger-electron Appearance Potential Spectroscopy |
| UHFQ | Unrestricted Hartree-Fock With Quartet Annihilation |
| DODS | Different Orbitals For Different Spins |
| ERCAM | Emission Reduction And Cost Analysis Model |
| OSCCM | Open-shell Coupled-cluster Method (in Electronic Property Calcn.) |
| CMBR | Cosmic Microwave Background Radiation |
| TMB | Table Mesa Basalt (USGS Rock Standard) |