| Acronym | Meaning |
| UNO | Unrestricted Natural Orbital |
| HG-AAS | Hydride Generation-at. Absorption Spectroscopy |
| RUDAD | RUmen-Derived Anaerobic Digester |
| ACC | Antarctic Circumpolar Current |
| NAPL | Nonaqueous Phase Liquid |
| TDEMSE | Time-dependent Effective Mass Schroedinger Equation |
| NCAP | Nematic Curvilinear Aligned Phase |
| TICS | Time Reversal Invariant Closed Shell (type Of Hartree-Fock Wave Function) |
| ZPE | Zero-point Energy |
| TOW | Time Of Wetting |