| Acronym | Meaning |
| CCA | Crystalline Colloidal Array |
| SPT | Standard Penetration Test |
| CCDC | Cambridge Crystallographic Data Center |
| ECS | Energy-corrected Sudden (scaling Theory In Mol. Collisions) |
| SAMPEX | Solar Anomalous And Magnetospheric Particle Explorer (spacecraft) |
| ETEX | European Tracer Experiment |
| ESP | Electrostatic Precipitator |
| LCMVAO | Linear Combination Of Modified Valence Atomic Orbital |
| ICF-CI | Interacting Correlated Fragment-CI (wave Function) (see Also SA-MCSCF) |
| CV | Calibrated Volume |