| Acronym | Meaning |
| IRN | Indicator Radionuclide |
| SC-HL | Self-consistent Heitler-London |
| APU | Acid Purification Unit (acid Recovery System) |
| ESP | Elimination Of Solvation Procedure |
| MRAIRS | Multiple Reflection-absorption Infrared Spectroscopy |
| CHIP | Cold And Hot Isostatic Pressing |
| HIM | Hydroxy Interlayered Minerals (clay Minerals) |
| OAQPS | Office Of Air Quality Planning And Standards |
| SPG | Sequential Product (of) Geminals |
| MECA | Molecular Emission Cavity Analysis |