National Communications System 
Net Control Station 
Network Centric Systems 
National Communication System 
National Cryptologic School 
Network Computing System 
Neighbour Caches 
Neighbor Caches 
Network Control System 
National Clandestine Service 
National Conservation Strategy 
nerve conduction study 
National Communication Systems 
NATIONAL COMMUNICATIONS SYSTEMS 
National Compensation Survey 
National Crime Squad 
Naval Control of Shipping 
Netherlands Computer Society 
Network Control Station 
network coordination station 
Network-based Call Signaling 
Node Center Switch 
Numerical Control Society 
Nashville Curb Symphony 
National Character Set 
National Children's Study 
National Comorbidity Survey 
National Compliance Strategy 
National Correspondents 
National Crime Survey