| Acronym | Meaning |
| CIRS | Composite Infrared Spectrometer |
| GSD | Geometric Std. Deviation |
| HSCT | Hematopoietic Stem Cell Transplantation |
| SO | Stieltjes Orbitals (for Mol. Photoionization Continua) |
| BCRLM | Bending-corrected Rotating Linear Model (for Reactive Scattering) |
| STAD | Simple Town Air Dispersion Model (of Air Pollution) |
| IU | International Unit |
| WRAS | Waste Reduction Advisory System |
| CCPP | Contagious Caprine Pleuropneumonia |
| CC-EH | Coupled-cluster Effective Hamiltonian |