CSN
CSN stands for:
- Canadian Switched Network , Canadian gateway or part of the Defense Switched Network
- China Southern Airlines , a Chinese airline (ICAO code)
- Companhia Siderúrgica Nacional , a Brazilian steel company
- Comunidad Sudamericana de Naciones , South American community of states
- Confederate States Navy , the Navy of the Confederate States in the US Civil War
- Consejo de Seguridad Nuclear , the Spanish nuclear regulator
- Crosby, Stills and Nash , a folk rock band
- Cutter-Sanborn number , a method used in library science to form alphanumeric abbreviations
CsN 3 stands for:
- Caesiumazid , cesium salt of hydrogen azide
csn stands for:
- Colombian Sign Language (ISO-639-3 code), Sign Language
