Caching Name Server 
Call Nonexistent Subroutine 
Canadian Navigation Society 
Canadian Neurological Scale 
Canadian Neurological Society 
Canadian Northern Shield 
Canadian Nuclear Society 
Canaveral National Seashore 
Can't Stop 
Cardiff Naturalists Society 
cargo network services 
carotid sinus nerve 
Catalogue of Nearby Stars 
Centennial Flight Centre 
Center for Nonproliferation Studies 
Center for Northern Studies 
Center for Nuclear Studies 
Central Navigation School 
central nerve system 
Central Nervou System 
central nervous 
central nervous system 
central nervous system disease 
Central Nervous System. 
central nervous systems 
central nervous systen 
Central Nervous Sytem 
Central neurocytomas 
centralized nuclear surety 
Centre for Nursing Studies