| Acronym | Meaning |
| HIMU | High U/Pb Mantle (component) |
| MEMPT | Many-electron Many-photon Theory (in Dynamic-polarizability Calcns. For Atoms And Ions) |
| SETS | Superfund Enforcement Tracking System |
| MCPA | Molecular Coherent-potential Approximation |
| GCTE | Global Change And Terrestrial Ecosystems |
| ETO | Elliptical-type Orbital |
| CBC | Circulating Bed Combustor (or Incinerator) |
| LRMS | Low Resolution Mass Spectrometry |
| FIC | Fractional Inhibitory Concentration |
| BS | Breathing Sphere (approxn. In Mol.-scattering Calcns.) |