CLSO
| Acronym | Definition |
|---|---|
| CLSO | Certified Laser Safety Officer (Laser Institute of America) |
| CLSO | Certified Lodging Security Officer |
| CLSO | Club Logistique du Sud-Ouest (French: Southwest Logistics Club; est. 1998) |
| CLSO | Community Learning Support Organization |
| CLSO | Confocal Laser Scanning Ophthalmoscope (ophthalmology) |
| CLSO | Contingency Landing Support Officer (NASA) |
| CLSO | Canadian Launch Safety Office (Transport Canada) |
| CLSO | Comptoir de Lunetterie du Sud-Ouest (French optical instrument manufacturer) |