| Acronym | Definition |
|---|
| CSN | Crosby, Stills, and Nash (band) |
| CSN | Cancer Survivors Network |
| CSN | College of Southern Nevada (various locations) |
| CSN | Community School of Naples (Florida) |
| CSN | Comcast SportsNet (TV channel) |
| CSN | Confédération des Syndicats Nationaux (French) |
| CSN | Consejo de Seguridad Nuclear (Spanish: Nuclear Safety Council) |
| CSN | Companhia Siderúrgica Nacional (Brazil) |
| CSN | Centrala studiestödsnämnden (Swedish: state education grant and loan program) |
| CSN | CS-Nation (Counter-Strike clan) |
| CSN | Comunidad Sudamericana de Naciones (Spanish: South American Community of Nations) |
| CSN | Children with Special Needs |
| CSN | Confederate States Navy |
| CSN | Children's Safety Network |
| CSN | Card Select Number |
| CSN | Calvary Satellite Network |
| CSN | Cable Shopping Network |
| CSN | Canadian Stroke Network |
| CSN | Customer Service Number (US IRS) |
| CSN | Community Services Network |
| CSN | Certified School Nurse |
| CSN | Circuit-Switched Network |
| CSN | Citrix Solutions Network |
| CSN | Canadian Syringomyelia Network |
| CSN | Comunidade Sul-Americana de Nações (Portuguese: South American Community of Nations) |
| CSN | Coopérant du Service National |
| CSN | Client-Server Network |
| CSN | Certified Sports Nutritionist |
| CSN | Carson Station (Los Angeles County Sheriff's Department) |
| CSN | Civil Society Networks |
| CSN | Computer Systems/Networking (degree) |
| CSN | Congregation of the Sisters of Nazareth |
| CSN | Clearstar Security Network (internet locksmith forum) |
| CSN | Concrete Syntax Notation (GSM) |
| CSN | Channel Sequence Number |
| CSN | Compact Service Node (Lucent) |
| CSN | Clinical Support Nurse |
| CSN | Catalog Sequence Number |
| CSN | Contract Surgeon |
| CSN | Colorado Soccer Net |
| CSN | Czech State Norm |
| CSN | Canada Stockwatch News |
| CSN | Cropping Systems Network |
| CSN | Control Symbol Number (government contracting) |
| CSN | Contract Serial Number |
| CSN | Circuit Symbol Number |
| CSN | Cycle Since New (aviation) |
| CSN | Control Serial Number (US Air Force) |
| CSN | Contact Serial Number |
| CSN | Community Staff Nurse |
| CSN | Castle Nursing Homes |
| CSN | Communications Service Node (Excel) |
| CSN | Common Service Network (Sprint) |
| CSN | Connecting the Soldier to the Network |
| CSN | Chicago Software News |
| CSN | Custom Switched Network |
| CSN | Configuration Sequence Number |
| CSN | Canadian Stamp News |
| CSN | Centre du Service National (French: National Service Center) |
| CSN | Coastal Surveillance Network (India) |
| CSN | Club Subaquatique Nantais (French: Nantes Underwater Club; Nantes, France) |
| CSN | Centre de Sécurité des Navires (French: Ship Safety Center) |
| CSN | Comité Stratégique pour le Numérique (French: Digital Strategy Committee) |
| CSN | Convention sur la Sûreté Nucléaire (French: Convention on Nuclear Safety) |
| CSN | Community Safety Network (various locations) |
| CSN | Corporate Social Network |
| CSN | Club Subaquatique Narbonnais (French: Narbonne Underwater Club; Narbonne, France) |
| CSN | Club Sportif Neuvillois (French sports club) |
| CSN | Club Sonneurs Normand (French music school) |