Nevada Test Site 
Night Targeting System 
Navigation Technology Satellite 
Naval Telecommunications System 
National Trust for Scotland 
Navigation Technology System 
Near Term Schedule 
NetWare Telephony Services 
Network Technical Support 
Non-Traffic Sensitive 
not to scale 
NT Server 
National Topographic System 
National Traffic System 
National Training System 
Navigation Technology Satellites 
Negative Torque Signal 
Network Test System 
Network Transport Services 
New Trading System 
Number Translation Services 
Numeric Transportation System 
Cirrus Air 
nanotubes 
National Tax Service 
National Technical Systems 
National Technology Satellite 
National Test Site 
National Testing Service 
National Topographic Series