| Acronym | Meaning |
| GTDA | Generalized Tamm-Dancoff Approximation |
| ROMP | Restricted Open-shell Moeller-Plesse |
| STIB | Stratosphere-Troposphere Interactions And The Biosphere |
| GCEC | Global Change And Ecological Complexity |
| BRDF | Bidirectional Reflectance Distribution Function |
| EMII | Enriched Mantle Component 2 (of S. R. Hart |
| CASE | Computer Assisted Structure Elucidation |
| FFEM | Freeze-fracture Electron Microscopy |
| ATDC | After Top Dead Center (gasoline And Diesel Engine Timing) |
| UVCS | UV Coronagraph Spectrometer |