Other
- Cell Signaling Networks
- Coláiste an Spioraid Naoimh, a secondary school in Cork City, Ireland.
- Collaborative Service Network
- College of Southern Nevada, a community college located in Clark County.
- Comunidad Sudamericana de Naciones, Spanish, South American Community of Nations
- Concrete Syntax Notation (CSN.1)
- Confederate States Navy
- Confédération des syndicats nationaux
- Congenital sensory neuropathy, Hereditary sensory and autonomic neuropathy Type II
- Cosmogenic stable nuclides
- Carlton Sports Network (CSN), a sports channel in Sri Lanka
- Czech technical standard (ČSN)
Read more about this topic: CSN