| Acronym | Meaning |
| PEXAFS | Photoemission Extended X-ray Absorption Fine Structure |
| UOVMO | Unoccupied Valence-type Mol. Orbital |
| LMC | Large Magellanic Cloud |
| ARIPO | African Regional Intellectual Property Organization |
| UNO-CAS | Unrestricted Natural Orbital-complete Active Space |
| APG | Antisymmetrized Product Of Geminals (wave Function) |
| ASAE | Alkali-sulfite-anthraquinone-ethanol (pulping Process) |
| BCIRA | British Cast Iron Research Association |
| VAH | Volatile Aromatic Hydrocarbon(s) |
| CHMO | Constrained Hartree-Fock Orbitals |