Other
- Nostalgia Super Stock, Fastest growing Class of Drag Racing
- The National Security Strategy of the United States
- Naked short selling, an illegal practice in stock trading
- Newsstand Specials, a spinoff of the Playboy magazine
- Nice Skate Shoes, a shoe brand
- A National Stockpile Site for the storage of nuclear weapons
- National Student Survey, a survey of final-year degree students in the UK
- Neutral Salt Spray test, a test to qualify the corrosion resistance of coatings on metal
- No Shit Sherlock, a phrase used to express someones lack of surprise at a question or statement
- Narcissistic supply source
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