| Acronym | Meaning |
| RUSTIC | Risk Of Unsaturated/saturated Transport And Transformation Of Chemical Concentrations |
| STXM | Scanning Transmission X-ray Microscope |
| SCM | Streaming Current Monitor (for Coagulation Water Treatment) |
| SSCAD | Spherical Self-consistent Atomic Deformation |
| STF | Slater-type Function |
| GDIM | Generalized Diatomics-in-molecules (theory) |
| T-GAS | Trace Gas Accounting System |
| CEFIC | European Chemical Industry Association |
| CNS | Central Nervous System |
| ISEC | Inverse Size-exclusion Chromatography |