| Acronym | Meaning |
| CEC | Commission Of The European Communities |
| SCA | Self-consistent Approximation |
| PEN | Personal Electronic Notebook |
| TOD | Total Oxygen Demand |
| DPCILO | Differential Perturbative Configuration Interaction Using Localized Orbitals |
| FALS | Familial Amyotrophic Lateral Sclerosis |
| GIT | Gastrointestinal Tract |
| HSF | Hiller-Sucher-Feinberg (equation For Calcn. Of Spin Densities And Charge Densities In Mols.) |
| SDCPA | Site-dependent Coherent Potential Approxn. |
| FAST | Fast Atom Sample Tester |