| Acronym | Meaning |
| VPT | Variational Perturbation Theory |
| QSTLS | Quantum Singwi-tosi-land-sjolander (theory |
| HMG-COA | 3-hydroxy-3-methylglutaryl Coenzyme A |
| NRA | Neutron Reaction Analysis |
| NIST | National Institute Of Standards And Technology (formerly NBS) |
| HHPN | Hydraulic High Pressure Nebulization |
| SME | Static Model Exchange (approxn. In Electron-mol. Scattering) |
| ALADDIN | Atmospheric Layer And Density Distribution Of Ions And Neutrals (NASA) |
| RDF | Restricted Dirac-Fock (quantum Calcn. Method) |
| EHMI | Environmental Hazards Management Institute |