| 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) |