MTSL
| Acronym | Definition |
|---|---|
| MTSL | Memory Time Switch Large (Siemens) |
| MTSL | Medical Technology Stock Letter (biotechnology investing newsletter; Berkeley, CA) |
| MTSL | Michigan Team Swim League (athletic association) |
| MTSL | Monitoring and Technical Support Laboratory |
| MTSL | Message Transfer SubLayer |
| MTSL | Microelectronics Technology Support Laboratory (European Space Agency) |