NM
- nm – (s) Nanometre
- nm, NM – Nautical mile
- N·m, Nm – Newton metre
- NM – (s) New Mexico (postal symbol)
- NMCI – (i) Navy Marine Corps Intranet
- NMCS – (i) Not Mission Capable Supply (SM&R code)
- NMD – (i) U.S. National Missile Defense
- NMN – (i) No middle name
- NMOS – (i/a) N-type/Negative Metal-Oxide-Semiconductor transistor ("enn-moss")
- NMSG – (i) NATO Modelling and Simulation Group
- NMR – (i) Nuclear Magnetic Resonance
- NMHNFG – (i) Not Made Here, No Fucking Good
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