| Acronym | Meaning |
| NPD | Normal Photoelectron Diffraction |
| GTF | Gaussian-type (wave) Function |
| IFSEM | International Federation Of Societies For Electron Microscopy |
| NWEA | National Wood Energy Association |
| MOT | Magnetooptical Trap |
| CSIR | Council For Scientific And Industrial Research (South Africa) |
| ISSC | International Subcommission On Stratigraphic Classification |
| SERS | Surface Enhanced Raman Spectroscopy |
| CTG | Control Technique Guidelines |
| QMC | Quantum Monte-Carlo (theory For Many-electron Atoms And Mols.) |