| Acronym | Meaning |
| IMG | Interferometric Monitor For Greenhouse Gases |
| APES | Adiabatic Potential Energy Surface |
| BET | Bond Equilibrium Theory |
| CFA | Component Failure Analysis |
| HBSS | Hanks' Balanced Salt Solution |
| SOS | Surfaces Of Section Method (semiclassical Calcn. Of Eigenvalues) |
| GRRR | Graduated Response For Risk Reduction |
| VPSA | Vainshtein-Presnyakov-Sobelman Approxn. (for Excitation In Atom-ion Collisions) |
| MO | Molecular Orbital |
| ESRIN | European Space Research Institute |