| Acronym | Definition |
|---|
| CNS | Central Nervous System (medical) |
| CNS | Communications |
| CNS | Catholic News Service |
| CNS | Clinical Nurse Specialist |
| CNS | Center for Nonproliferation Studies (Monterey Institute of International Studies) |
| CNS | Centre for Newfoundland Studies |
| CNS | Congress of Neurological Surgeons |
| CNS | Center for Nanotechnology in Society (various locations) |
| CNS | Centre National de Séquençage (French: National Sequencing Center) |
| CNS | Computing and Network Services (Portland State University) |
| CNS | College of Natural Sciences |
| CNS | Certified Nutrition Specialist |
| CNS | Corporation for National Service |
| CNS | Cybercast News Service (formerly Conservative News Service) |
| CNS | Continuous Net Settlement (finance) |
| CNS | Coagulase-Negative Staphylococci |
| CNS | Thiocyanate |
| CNS | Conseil National du SIDA |
| CNS | Communication Navigation & Surveillance |
| CNS | Chicken Noodle Soup |
| CNS | Canadian Nuclear Society |
| CNS | Cognitive Neuroscience Society |
| CNS | Canwest News Service (Canada) |
| CNS | Cisco Networking Services |
| CNS | Cardinal Newman Society |
| CNS | City News Service |
| CNS | Communications Network Services |
| CNS | Chinese National Standard (Taiwanese encoding scheme, simplified Chinese character set) |
| CNS | Corporate Network Services (Sprint) |
| CNS | Conservative News Service (now Cybercast News Service) |
| CNS | Chief of Naval Staff |
| CNS | Certified Novell Salesperson |
| CNS | Community Nursing Services (Murray, Utah) |
| CNS | Communication and Network Services (UC Berkeley) |
| CNS | Cooper Nuclear Station (Nebraska) |
| CNS | Computer Network System |
| CNS | Certified Neighborhood Specialist (real estate designation) |
| CNS | Current News Service |
| CNS | Canadian Neurological Society |
| CNS | CompuServe Network Services |
| CNS | Center for Nonverbal Studies |
| CNS | Custom Network Solutions (Nextel) |
| CNS | Cairns, Queensland, Australia - Cairns (Airport Code) |
| CNS | Comverse Network Systems |
| CNS | Cicero-North Syracuse High School (Cicero, New York, USA) |
| CNS | Comite de Normalisation de la Soudure (France) |
| CNS | Complementary Network Service |
| CNS | Clinical Nurse Specialist: The Journal for Advanced Nursing Practice |
| CNS | Converged Network Services (Sprint) |
| CNS | Chrome-Nickel-Steel |
| CNS | County Nursing Service |
| CNS | Central Nursing Station |
| CNS | Connection Not Successful Signal |
| CNS | Central North Slope (Alaska) |
| CNS | Connecticut Neuropsychological Society |
| CNS | Center for Nanostructures (Santa Clara University, School of Engineering) |
| CNS | Columbus Numismatic Society |
| CNS | Communications Networking System |
| CNS | Chemical Neutralization System |
| CNS | Commercial Network Survivability |
| CNS | Communications Network Simulator |
| CNS | Computer Network Subsystem |
| CNS | Critical Network Spare(s) |
| CNS | Combustion Noise Sensor |
| CNS | Channel Networking Service |
| CNS | Change Notice Suspense File |
| CNS | Commonwealth Naval Ship (Australia) |