| Acronym | Meaning |
| FO-ECP | Frozen Orbital-effective Core Potential |
| PCCS | Phase-corrected Coupled-states (approxn. For Scattering Calcns.) |
| SIV | Simian Immunodeficiency Virus |
| IDI | Ion Dipole Induced (potential Term In Potential Energy Surfaces) See Also LEPS-IDI |
| LCIF | Linear Combination Of Interacting Forces |
| PSPC | Position Sensitive Proportional Counter |
| CNES | Centre National D'Etudes Spatiales (French Space Center) |
| BID | Brinell Indentation Diameter |
| GIMS | Grazing Incidence Moessbauer Spectroscopy |
| ONDOR | Optical Nuclear Double Resonance |