CSN
CSN might be an acronym or abbreviation for:
- Concrete Syntax Notation
- Comcast SportsNet
- Comunidad Sudamericana de Naciones (Spanish, South American Community of Nations)
- Cable Science Network
- Cell Signaling Networks
- Confédération des syndicats nationaux
- Companhia Siderúrgica Nacional
- Crosby, Stills & Nash (and Young)
- Confederate States Navy
- Calvary Satellite Network
- Cable Shopping Network
- CovySoft Networks