NNS

NNS can stand for:


 * New neoclassical synthesis (economics)
 * NASCAR Nationwide Series (previous name of the NASCAR Xfinity Series)
 * Nashville Number System (music)
 * National Numeracy Strategy (UK education)
 * Near Net Shape
 * Nearest neighbor search
 * Nearly-new sale
 * Newport News Shipbuilding, a shipyard
 * Nigerian Navy Ship
 * Nippon Television Network System
 * Non-Nutritive Sweetener, i.e. a Sugar substitute