| Acronym | Meaning |
| STCA | Simplified Traveling-cluster Approxn. (for Electronic Structure) |
| EGW | Electrogas Welding |
| CLD | Certainly Lethal Dose |
| IDCNS | Interdivisional Committee On Nomenclature And Symbols |
| SIM | Stress-induced Martensite |
| SAPW | Symmetrized Augmented Plane Wave |
| SS | Stainless Steel |
| IMO | Intermolecular Mol. Orbital |
| SPS | Sucrose-phosphate Synthase |
| IPNO | Independent-pair Natural Orbital |