| Acronym | Meaning |
| IRS | Inverse Raman Scattering |
| ESP | Exchangeable Sodium Percentage (soils) |
| SETM | Statistical Electron Transfer Model (for Electron-exchange Collisions) |
| TARIS | Thermal Atomization Resonance Ionization Spectrometry |
| LPME | Liquid-phase Microextraction |
| MORB | Mid-ocean Ridge Basalt |
| MOSO | Maximum Overlap Symmetry Orbital (MO For Mols.) |
| ESE | Exact Static-exchange (approxn. In Scattering Calcns.) |
| SRXFA | Synchrotron Radiation X-ray Fluorescence Analysis |
| CI | Compression-ignition (engine) |