| Acronym | Meaning |
| GC | Guanine + Cytosine |
| LSDXS-SIC | Local-spin-density (with) Screened Exchange (and) Self-interactiond Correction |
| SCAR | Scientific Committee On Antarctic Research |
| NITEP | National Incinerator Testing And Evaluation Program (Canada) |
| VPM | Variable Phase Method (for Electron-atom Scattering Calcns.) |
| WAXS | Wide-angle X-ray Scattering |
| MIAR | Mass Isotopomer Abundance Ratio |
| O/E | Observed Number/expected Number Ratio = Relative Risk |
| IRMM | Institute For Reference Materials And Measurements |
| NSIDC | National Snow And Ice Data Center (University Of Colorado) |