| Acronym | Definition |
|---|
| ASTO➣Association of Sail Training Organisations (UK) |
| ASTO➣Apple Sales Training Online |
| ASTO➣Antistreptolysin O |
| ASTO➣Association of Scientific and Technical Officers (India) |
| ASTO➣Advanced Systems and Technology Office (Naval Sea Systems Command) |
| ASTO➣Aerospace and Technology Oberpfaffenhofen (Germany) |