| Acronym | Meaning |
| SSPM | Scanning Surface Potential Microscopy |
| IRMS | Isotope Ratio Mass Spectrometry |
| PGP | Previous Glacial Period (glacial Maximum Of O18 Stage 6; Predates The LGM) |
| DPF | Diesel Particulate Filter |
| HMM | Half Molecule Model (for Electron Scattering By Molecules) |
| QHE | Quantum Hall Effect |
| ZSR | Zdanovskii-Stokes-Robinson [model] |
| IGSCC | Intergranular Stress Corrosion Cracking |
| REX | Relativistically Parametrized Extended Hueckel |
| NDO | Neglect Of Differential Overlap |