| Acronym | Meaning |
| GWKB | Generalized Wentzel-Kramers-Brillouin |
| PDGFR | Platelet-derived Growth Factor Receptor |
| PCA | Preliminary Consequence Analysis |
| MRSD-CI | Multireference Single And Double Excitation CI |
| UNS | Unified Numbering System For Metals And Alloys |
| AXS | Anomalous X-ray Scattering |
| ASSP | Aerosol Scattering Spectrometer Probe |
| COP | Coefficient Of Performance |
| ICSC | International Chemical Safety Card |
| WSOEA | Wallace Second-order Eikonal Approximation |