Nuclear Regulatory Commission 
National Research Council 
National Response Center 
Nuclear Regulatory Commission's 
National Research Center 
National Research Council's 
Norwegian Refugee Council 
National Referral Center 
Network Reliability Council 
Non-Recurring Charge 
National Reconditioning Center 
National Records Center 
National Recycling Coalition 
National Reference Centre 
National Regulatory Commission 
National Research Council of Canada 
National Resource Center 
Neighborhood Reinvestment Corporation 
Network Reliability Center 
Nichols Research Corporation 
Noise Reduction Coefficient 
Non-Unit-Related Cargo 
normal retinal correspondence 
Merchants Despatch Transportation Corp… 
National Rail Corporation 
National Recyclers Coalition 
National Refrigerator Car line 
National Remodelers Council 
National Replacement Character 
National Research Canada