| Acronym | Meaning |
| PAA | Poly (acrylic Acid) |
| SCAF | Self-consistent Anisotropic Field |
| GNMP | Generalized Nonlocal Model Potential |
| IUAM | Independent United Atom Model (in Positron Scattering By Mols.) |
| YOS | Yttrium Orthosilicate |
| AEGIS | ATM European Group For Improvement Of Scenarios |
| UHMWPE | Ultra High Molecular Weight Polyethylene |
| MOT | Multistate Orbital Treatment |
| DAPS | Disappearance Potential Spectroscopy |
| ASM | Activated-sludge Model |