| Acronym | Definition |
|---|
| QSI | Qualcomm Strategic Initiatives |
| QSI | Queue Status Indicator |
| QSI | Queue State Information |
| QSI | Quality Standards for Inspections |
| QSI | Quality Services International (San Antonio, TX) |
| QSI | Quality Step Increase |
| QSI | Quick Step-Innergetic (Belgian cycling team) |
| QSI | Qualified Stated Interest (taxes) |
| QSI | Quality Systems International |
| QSI | Quality Solutions Inc (Wichita, KS) |
| QSI | Quality Service Index |
| QSI | Quality Salary Increase |
| QSI | Qualimetrics Sensor Interface |
| QSI | Quantum Statistical Inference |
| QSI | Quarterly Safety Inspection |
| QSI | Unable to Break in on Transmission (radiotelegraphy) |
| QSI | Quanta Storage Incorporated |