| Acronym | Meaning |
| FBEM | Fixed Beam Electron Microscopy |
| ESW | Equivalent Slab Waveguide |
| NSWS | National Surface Water Survey |
| FMAFSH | FeO-MgO-Al2O3-Fe2O3-SiO2-H2O System |
| ABWAG | Abwasserabgabengestres (Germany Wastewater Discharge Law Regulates Cost Per Volume) |
| SIDP | Sputter Ion Depth Profiling |
| NAIP | Non-Apatite Inorganic Phosphorus |
| ECE | Electrical Conductivity Of Saturation Extract (soils) |
| EMIT | Enzyme-multiplied Immunoassay Technique |
| SO | Stieltjes Orbitals (for Mol. Photoionization Continua) |