| Acronym | Meaning |
| IRMM | Institute For Reference Materials And Measurements |
| BO | Biorthonormal (wave Function) |
| SHG | Second Harmonic Generation |
| AOU | Apparent Oxygen Utilization |
| POAM | Polar Ozone And Aerosol Measurements |
| CHEF | Chelation Enhanced Fluorescence |
| BAT | Biol. Tolerance Value (German Std.) |
| GLIS | Global Land Information System |
| PODS | Periodic Orbit Dividing Surfaces (in Potential Surface Calcn.) |
| SIDMS | Speciated Isotope Dilution Mass Spectrometry |