National Security Agency 
Northern Study Area 
Naval Support Activity 
National Security Act 
National Security Agency's 
National Sheriffs' Association 
National Society of Accountants 
national security area 
National Shipping Authority 
National Standards Association 
Netherlands Society for Automation 
Network Software Associates 
No Such Agency 
North Slope of Alaska 
National Safety Associates 
National Scenic Area 
National Security Archive 
National Sheep Association 
National Sheriffs Association 
National Stone Association 
National Stroke Association 
Navy Stock Account 
Network Service Address 
Next Station Addressing 
No Strings Attached 
No Such Address 
Node Switching Assembly 
non-state actor 
Normalized Site Attenuation 
Norton System Administrator