NM, nm, and variations may refer to:
Businesses and organizations
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Northwestern Mutual, financial services company in Wisconsin, United States
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Air Madrid (IATA airline designator NM), Spanish airline
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Mount Cook Airline (IATA airline designator NM), New Zealand airline
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Manx2 (IATA airline designator NM), Isle of Man airline
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Namarakieana Movement (NM), political party in Vanuatu
Places
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North Macedonia a country in the Balkans
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The National Mall in Washington, D.C., United States
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Navi Mumbai, India
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New Mexico, a state of the United States (postal abbreviation)
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Inner Mongolia, an autonomous region of China (Guobiao abbreviation and ISO-3166-2:CN code NM)
Science and technology
Medicine
Units of measure
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Nanometer (nm), an SI unit of length, equal to 10−9 m (a thousand-millionth of a meter)
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Nanomolar (nM), in chemistry, one thousand-millionth molar
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Nautical mile (NM or nmi), a unit of length used for maritime and aerospace purposes
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Newton-metre (N m, may also be written as N·m), a unit of torque
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Normal cubic metre (Nm3), a unit of volume ( normal referring to standard temperature and pressure)
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Normalizovaný muštomer (°NM), a scale of wine must density
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Number metric, a measure of linear density of fibers in textiles
Other uses in science and technology
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nm (Unix), a computer program used as an aid for debugging
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NM, nonmetallic-sheathed electrical cable (in North America), nowadays typically thermoplastic-sheathed cable
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Noise margin, the amount by which a signal exceeds the minimum amount for proper operation
Other uses
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Never mind, or nothing much or not much in Internet slang
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Namma Metro, a rapid transit line in Bangalore, India
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Nao Sena Medal, a gallantry award for servicemen in the Indian Navy
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National monument
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National monument (United States)
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National Master, a chess title
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no mark, an athletics abbreviation indicating that an athlete participated in a field event but recorded no valid height, jump, or throw.