National Command Authority 
National Command Authorities 
National Cemetery Administration 
Network Computing Architecture 
Nurse Competence in Aging 
National Conservation Area 
Naval Communications Annex 
Navy Calibration Activity 
New Communities Administration 
Noise Control Act 
North Central Association 
Northwest Computing Association 
NASA Communications Architecture 
National Caving Association 
National Chiropractic Association 
National Coal Association 
National Convergence Alliance 
National Coverage Analysis 
Neutralized current acid 
Nippon Cargo Airlines 
Number of Calls Abandoned 
IATA code for MCAS New River, Jacksonv… 
Naphthalene Carbonic Acid 
NASA Cooperative Agreement 
Nashua Christian Academy 
National Cancer Act 
National Canine Association 
National Canners Association 
National Capital Area 
National Capitol Area