| Acronym | Definition |
|---|
| QSA | Queens of the Stone Age (rock band) |
| QSA | Queensland Studies Authority (Australia) |
| QSA | Qt Script for Applications |
| QSA | Quality System Assessment |
| QSA | Quaker Social Action (London charity) |
| QSA | Queen Scout Award (UK) |
| QSA | Signal Strength (S1 to S9) |
| QSA | Quality Safety Audit (United Kingdom) |
| QSA | Quality Society of Australasia |
| QSA | Qualification Site Approval |
| QSA | Quality Self Assessment |
| QSA | Quadripartite Standardization Agreement |
| QSA | Quality System Associates |
| QSA | Queensland Shopkeepers Association |
| QSA | Qualified Security Assesor (payment card industry) |
| QSA | Quadrifilar Spiral Antenna |
| QSA | Quasi-Static Analysis |
| QSA | Quasi-Stationary Algorithm |