| Acronym | Meaning |
| PMOS | P-channel Metal Oxide Semiconductor |
| QTPT | Quantum Thermodynamic Perturbation Theory |
| MDS | Matrix-diagonalization Sudden Approximation (for Atom Surface Scattering Calcns.) |
| LEERM | Low Energy Electron Reflection Microscopy |
| DIDA | Direct Isotope Dilution Analysis |
| DIC | Disseminated Intravascular Coagulation |
| INS | Ion Neutralization Spectroscopy |
| GIOS | Generalized Infinite Order Sudden |
| NODS | NASA Ocean Data System |
| SOHO | Solar And Heliosphere Observatory |