| Acronym | Meaning |
 | APUHF | Approximately Projected Unrestricted Hartree-Fock |
 | VO | Valence Orbital |
 | HESI | Health And Environmental Sciences Institute |
 | PNA | Paraffins, Naphthenes, And Aromatics (in Petroleum Analysis) |
 | SMB | Simulated Moving Bed |
 | DEC | Department Of Environmental Conservation |
 | LEPD | Low-Energy Positron Diffraction |
 | EHS | Environment |
 | SME | Static Model Exchange (approxn. In Electron-mol. Scattering) |
 | YAG | Yttrium Aluminum Garnet |