| 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) |