NSB may refer to:
Education:
National Spelling Bee, the Scripps National Spelling Bee, a competition in the US,
National Science Bowl, a high school academic competition,
Northampton School for Boys, a British Secondary School,
North Sydney Boys High School, an Australian high school,
Politics and government:
National Science Board, the governing body of the National Science Foundation.,
Nationaal-Socialistische Beweging, a fascist political movement in the Netherlands (1931-1945),
National Socialist Bloc, a historical political movement in Sweden,
National Security Bureau, the intelligence agency of Republic of China,
Naval Submarine Base, (US):
Naval Submarine Base New London,
Naval Submarine Base Kings Bay,
,
National Seamen Board of the Philippines,
Other:
NetApp Syncsort Backup,
New Smyrna Beach, Florida, a city in the US.,
The Nihilist Spasm Band, Canadian free improvisation musical collective.,
Nippon Shortwave Broadcasting now Radio Nikkei, a domestic commercial shortwave radio station in Japan.,
Norwegian State Railways (Norges Statsbaner), a current train operating company,
Norwegian State Railways (1883-1996), a former government agency,
Nature Structural & Molecular Biology, an academic journal,
Nu skool breaks,
Natural Snow Buildings, a French experimental music duo,
Night sky background, notation used in astronomy/astrophysics,
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