| Acronym | Meaning |
| ETO | Exponential-type Orbital |
| LEMA | Least Error Matrix Analysis |
| EPIC | Erosion-productivity Impact Calculator |
| ICAME | International Commission On Application Of Moessbauer Effect |
| LPFG | Long-period Fiber Grating |
| FCVA | Filtered Cathodic Vacuum Arc |
| CDFT | Chemical-density-functional Theory |
| STOCSY | Statistical Total Correlation Spectroscopy |
| ROM | Read Only Memory |
| TSO | Time Sharing Option |