| Acronym | Definition |
|---|
| CNS | Central Nervous System (medical) |
| CNS | Catholic News Service |
| CNS | Congress of Neurological Surgeons |
| CNS | Communications |
| CNS | Clinical Nurse Specialist |
| CNS | Caisse Nationale de Santé (French: National Health Fund; Luxembourg) |
| CNS | Computing and Network Services (Portland State University) |
| CNS | College of Natural Sciences |
| CNS | Consejo Nacional de Seguridad (Spanish: National Security Council; various locations) |
| CNS | Canwest News Service (Canada) |
| CNS | Center for Nonproliferation Studies (Monterey Institute of International Studies) |
| CNS | Centre for Newfoundland Studies |
| CNS | Cybercast News Service (formerly Conservative News Service) |
| CNS | Center for Nanotechnology in Society (various locations) |
| CNS | Cognitive and Neural Systems (various universities) |
| CNS | Thiocyanate |
| CNS | Council for National Security (various organizations) |
| CNS | Centre National de Séquençage (French: National Sequencing Center) |
| CNS | Citizen News Service |
| CNS | Center for Neural Science (various locations) |
| CNS | Courthouse News Service |
| CNS | Commercial Network Services (online service provider) |
| CNS | Conference Nationale Souveraine (French: Sovereign National Conference; Zaire) |
| CNS | Classified National Security |
| CNS | Continuous Net Settlement (finance) |
| CNS | Coagulase-Negative Staphylococci |
| CNS | Conseil National du SIDA |
| CNS | Corporation for National Service |
| CNS | Communication Navigation & Surveillance |
| CNS | Covenant not to Sue |
| CNS | Converged Network Services |
| CNS | Computer Network Specialist |
| CNS | Communication and Navigation System |
| CNS | Communication and Network Services |
| CNS | Cisco Network Security |
| CNS | Caching Name Server |
| CNS | Call Name Service |
| CNS | Citrix Netscaler |
| CNS | Corporate Network Solutions |
| CNS | Color Naming System |
| CNS | Computer Network Support |
| CNS | Certified Nutrition Specialist |
| CNS | Cognitive Neuroscience Society |
| CNS | Covenant Not to Sue (contract term) |
| CNS | Comprehensive National Strategy (various organizations) |
| CNS | Converged Network Solutions (various organizations) |
| CNS | Clinical Neuroscience Society (various locations) |
| CNS | Cardinal Newman Society |
| CNS | City News Service |
| CNS | Council for Nuclear Safety (South Africa) |
| CNS | Community Nursery School (various locations) |
| CNS | Communications Network Services |
| CNS | Chief of Naval Staff |
| CNS | Canadian Nuclear Society |
| CNS | Canal Numérique des Savoirs (French: Digital Channel of Knowledge; educational resource) |
| CNS | Convention on Nuclear Safety (international agreement; est. 1994) |
| CNS | Chicken Noodle Soup |
| CNS | Clinical Nutrition Service (various locations) |
| CNS | Computer and Networking Services (various organizations) |
| CNS | Chinese National Standard (Taiwanese encoding scheme, simplified Chinese character set) |
| CNS | Cicero-North Syracuse High School (Cicero, New York, USA) |
| CNS | Community Nursing Services (Murray, Utah) |
| CNS | Conservative News Service (now Cybercast News Service) |
| CNS | Catalog of Nearby Stars |
| CNS | Community and Neighborhood Services (various locations) |
| CNS | Commission Nationale Skateboard (French: National Skateboard Commission) |
| CNS | Camp Nathan Smith (military base; Afghanistan) |
| CNS | Compliance Navigation Specialists (Lititz, PA) |
| CNS | Communications Nova Scotia (Canada) |
| CNS | Certified Novell Salesperson |
| CNS | Cisco Networking Services |
| CNS | Cercle Nautique de Schoelcher (French boating club) |
| CNS | Certified Neighborhood Specialist (real estate designation) |
| CNS | City of Norwich School (UK) |
| CNS | Cooper Nuclear Station (Nebraska) |
| CNS | Computer Network System |
| CNS | Center for Nonverbal Studies |
| CNS | Centre Namurois de Sport (French: Namur Sports Center; Namur, Belgium) |
| CNS | Corporate Network Services (Sprint) |
| CNS | Clean Nova Scotia (Canada) |
| CNS | Custom Network Solutions (Nextel) |
| CNS | Community Notification System (various locations) |
| CNS | Club Nautique des Salettes (French boating club) |
| CNS | Communication and Network Services (UC Berkeley) |
| CNS | Canadian Neurological Society |
| CNS | Cairns, Queensland, Australia - Cairns (Airport Code) |
| CNS | Cercle Nautique de la Sinope (French sailing club) |
| CNS | Corps National de Sécurité (French: National Security Corps; Algeria) |
| CNS | Concept Nettoyage Service (French cleaning company) |
| CNS | CompuServe Network Services |
| CNS | Comverse Network Systems |
| CNS | Comite de Normalisation de la Soudure (France) |
| CNS | Clinical Nurse Specialist: The Journal for Advanced Nursing Practice |
| CNS | Complementary Network Service |
| CNS | Current News Service |
| CNS | Conferee Networking Sessions (Pittcon; Pittsburgh, PA) |
| CNS | Chicago Numismatic Society (Chicago, IL) |
| CNS | Conseil National de Suggestopédie (French: National Council of Suggestopedia; pedagogy) |
| CNS | Converged Network Services (Sprint) |
| CNS | Chrome-Nickel-Steel |
| CNS | Consejo Nacional del Salario (Spanish: National Salary Council; various locations) |
| CNS | Centre Nord-Sud (French: North-South Center; Council of Europe; est. 1984) |
| CNS | Center for Nanostructures (Santa Clara University, School of Engineering) |
| CNS | Connection Not Successful Signal |
| CNS | Central Nursing Station |
| CNS | County Nursing Service |
| CNS | Connecticut Neuropsychological Society |
| CNS | Clips 'n' Stuff (firearms) |
| CNS | Cohesive Non-Swelling (soil mechanics) |
| CNS | Columbus Numismatic Society |
| CNS | Communications Networking System |
| CNS | Central North Slope (Alaska) |
| CNS | Commercial Network Survivability |
| CNS | Communications Network Simulator |
| CNS | Computer Network Subsystem |
| CNS | Communications, Navigation Systems (aviation) |
| CNS | Channel Networking Service |
| CNS | Critical Network Spare(s) |
| CNS | Combustion Noise Sensor |
| CNS | Change Notice Suspense File |
| CNS | Commonwealth Naval Ship (Australia) |
| CNS | Chemical Neutralization System |