NM, nm, and variations may refer to:

Businesses and organizations

* Northwestern Mutual, financial services company in Wisconsin, United States * Air Madrid (IATA airline designator NM), Spanish airline * Mount Cook Airline (IATA airline designator NM), New Zealand airline * Manx2 (IATA airline designator NM), Isle of Man airline

Places

* The National Mall in Washington, D.C., United States * Navi Mumbai, India * New Mexico, a state of the United States (postal abbreviation) * Inner Mongolia, an autonomous region of China (Guobiao abbreviation and ISO-3166-2:CN code NM)

Science and technology

Medicine

* Nemaline myopathy, a neuromuscular disorder * Neuromelanin, a dark pigment found in the brain * Nuclear medicine, a medical imaging modality

Units of measure

* Nanometer (nm), an SI unit of length, equal to 10⁻⁹ m (a thousand-millionth of a meter) * Molar (concentration), Nanomolar (nM), in chemistry, one thousand-millionth molar * Nautical mile (NM or nmi), a unit of length used for maritime and aviation purposes * Newton metre (Nm, may also be written as N·m), a unit of torque * Normal cubic metre (Nm³), a unit of volume (''normal'' referring to standard temperature and pressure) * Normalizovaný muštomer (°NM), a scale of wine must density * Units of textile measurement, Number metric, a measure of linear density of fibers in textiles

Other uses in science and technology

* nm (Unix), a computer program used as an aid for debugging * NM, nonmetallic-sheathed electrical cable (in North America), nowadays typically Thermoplastic-sheathed cable#North America, thermoplastic-sheathed cable * Noise margin, the amount by which a signal exceeds the minimum amount for proper operation

Other uses

* ''Never mind'', or ''nothing much'' or ''not much'' in Internet slang * Namma Metro, a rapid transit line in Bangalore, India * Nao Sena Medal, a gallantry award for servicemen in the Indian Navy * National monument ** National monument (United States) * National Master, a chess title {{disambiguation