| Acronym | Meaning |
| ABC | Absorbing Boundary Condition (green Function) |
| CCWP | Close-coupling Wave-packet (for Mol. Scattering) |
| ECHO | European Community Host Organization |
| TIME | Test, Inspect, Measure, And Evaluate |
| ZCLV | Zoned Constant Linear Velocity |
| RTFDW | Relativistic Thomas-Fermi-Dirac-Weizsaecker (electron-d. Theory) |
| PT-MVD | Perturbation Theory (with) Mass-velocity And Darwin (operators) |
| SEGS | Solar Electric Generating System |
| CCFL | Countercurrent Flow Limitation |
| DSC | Differential Scanning Calorimetry |