| Acronym | Meaning |
| LCAO LDA | LCAO-local Density Approxn. |
| PSIT | Plasma Source Ion Trap |
| WT | Wild Type |
| BOA | Bidirectional Orbital Approximation (in Valence Bond Theory) |
| BRNO | Best Radial Natural Orbital |
| FFITP | Free-flow Isotachophoresis |
| ARF | ADP-ribosidation Factor |
| ENC | Effective Nuclear Charge (model For Mol. Property Calcns.) |
| SMB | Simulated Moving Bed |
| KAM | Kolmogorov-Arnold-Moser (theorem In Quantum Stochasticity) |