CNSO
| Acronym | Definition |
|---|---|
| CNSO | Czech National Symphony Orchestra (Czech Republic) |
| CNSO | Country-code Names Supporting Organization |
| CNSO | Congress of National Seniors Organizations |
| CNSO | Constructions Nautiques du Sud-Ouest (French: South West Ship Builders) |
| CNSO | Chicago National Science Olympiad |
| CNSO | Computer Network Software Operations (continuing education course; Department of Education; Virginia) |