| Acronym | Meaning |
| PHEMT | Pseudomorphic High Electron Mobility Transistor |
| RAIN | Reactions And Intermediates Network |
| PMA | Pharmaceutical Manufacturers Association |
| CME | Crucible Melt Extraction |
| PAC | Polycyclic Aromatic Compound |
| PTC | Positive Temperature Coefficient [elec. Conducting Material] |
| TDFM | Two-surface Dirac-Frenkel-Mclachlan (variational Method) |
| ISCST | Industrial Source Complex Short Term Model (US EPA) |
| MARIA | Methods For Assessing The Radiological Impact Of Accidents |
| CBS | Complete Basis Set |