CNS
- AmeriCorps
- CNS (chemical weapon)
- CNS TV 6
- CNSNews
- Cairns International Airport
- Canadian Nuclear Society
- Cartoon Network Studios
- Catholic News Service
- Cell (journal)
- Central nervous system
- Chateau Neuf Spelemannslag
- Chief of the Naval Staff (disambiguation)
- China News Service
- Chinese National Standards
- Chinese Nuclear Society
- Cicero-North Syracuse High School
- City News Service
- City of Norwich School
- Clinical nurse specialist
- Coagulase-negative staphylococcus
- Color Naming System
- Communication, navigation and surveillance
- Communications Nova Scotia
- Computation and Neural Systems
- Congress of Neurological Surgeons
- Connectedness to nature scale
- Conserved non-coding sequence
- Cooper Nuclear Station
- Copley News Service
- Council for National Security
- Cox News Service
- Crigler–Najjar syndrome
- Crystallography and NMR system
- Cuban National Series
- Custody Notification Service
- Nature (journal)
- Republic of China Navy
- Science (journal)
- Szekler National Council