| Acronym | Meaning |
| HSES | Hydrostatic Equilibrium System |
| G1 | Gaussian-one (theory For Calcg. Mol. Energies) |
| REPELS | Reemitted Positron Energy Loss Spectroscopy |
| MAO | Monoamine Oxidase |
| AAMOM | An Approximate Molecular Orbital Method |
| SSQM | Supersymmetric Quantum Mechanics |
| ICD | Induced Circular Dichroism |
| AVIRIS | Airborne Visible-infrared Imaging Spectrometer |
| PUMP | Pure (alpha-spin-state) Unrestricted Moeller-Plesset Nth-order (wave Function) |
| GPEF | Generalized Potential Energy Function |