| Acronym | Meaning |
| CSRS | Cooperative State Research Service (US Dept. Of Agriculture) |
| ISIS | Image-selected In Vivo Spectroscopy |
| CCTM | Coupled-channel Transition Matrix (in Atom-surface Scattering) |
| EPM | Empirical Pseudopotential Method |
| HLA | Human Leukocyte Antigen |
| ISD | Ion Stimulated Desorption |
| SOMBT | Second-order Many-body Theory |
| HAMS | Helium Atoms Measurement System |
| LOXJET | Liq. Oxygen Torch System |
| EMEA | European Medicines Evaluation Agency |