| Acronym | Meaning |
| AREP | Averaged Relativistic Effective Potential |
| LRTAP | Long-range Transboundary Air Pollution |
| HBT | Hanbury Brown Twiss (interferometry) |
| D-CI | Double Excitations In Configuration Interaction |
| TIMS | Thermal Ionization Mass Spectrometry |
| CRIOSA | Classical Reactive Infinite Order Sudden Approxn. |
| IEL | Intraepithelial Lymphocyte |
| THRASH | Thorough High Resolution Analysis Of Spectra By Hornf1fs |
| PPLV | Preliminary Pollutant Limit Value |
| OMO | Orthogonalized Magnetic Orbital |