| Acronym | Meaning |
| MCTDH | Multiconfigurational Time-dependent Hartree (theory) |
| CCSEM | Computer-controlled Scanning Electron Microscopy |
| ECPMET | Extended Coupled Pair Many Electron Theory |
| PIPECO | Photoion-photoelectron Coincidence Spectroscopy |
| BD | Brueckner (orbitals With) Double (substitution) (in Electron Correlation) |
| FLAIR | Fluid Attenuated Infrared Sequence |
| MDHS | Methods For The Determination Of Hazardous Substances |
| ASTHO | Association Of State And Territorial Health Officers |
| OCIS | Optics Classification And Indexing Scheme |
| HAADF | High-angle Annular Dark-field |