| Acronym | Meaning |
| CMOD | Crack Mouth Opening Displacement |
| NERC | Natural Environment Research Council (UK) |
| OSM | Overlapping Sphere Model |
| PZC | Polyzirconium Compound (isopropyl Alc.-zirconium Chloride Copolymer) |
| PSS | Primary Sewage Sludge |
| SCBSA | Self-consistent Boundary-site Approxn. (for D.-of-states) |
| WIPP | Waste Isolation Pilot Plant (for Nuclear Wastes) |
| PCILOCC | PCILO For Crystal Calculations |
| CEPA | Correlated Electron Pair Approxn. |
| TIMS | Thermal Ionization Mass Spectrometry |