| Acronym | Meaning |
| HSX | Helically Symmetric Experiment |
| STHF | Single-term Hartree-Fock |
| LHASA | Logic And Heuristics Applied To Synthetic Analysis |
| ICAO | International Civil Aviation Organization |
| LISS | Low Ionic Strength Solution |
| MSA | Methanesulfonic Acid (air Pollutant) |
| FPLH | Free-Phase Liquid Hydrocarbon |
| CSF | Catalyzed Soot Filter |
| ECP | Eosinophil Cationic Protein |
| BMA | British Medical Association |