The acronym NSM may refer to:
In general culture:
- National Socialist Movement, a name used by a number of neo-Nazi organizations
- New social movements, social movements which depart significantly from the conventional social movement paradigm
- Non-Stipendiary Minister, an unpaid priest in the Church of England and Church of Ireland
- New Socialist Movement, A new political party in Gujarat that was registered in June 2007
- New Sector Movements, a music project fronted by the British musician IG Culture
In science:
- National Science Museum of Japan collection code
- Natural semantic metalanguage
- New Smoking Material, tobacco substitutes such as Cytrel
In business:
- Nack, Schulze und Menke, a German manufacturer of jukeboxes
- NASDAQ Stock Market (occasionally used three-letter abbreviation)
In computing:
- Network Status Management in wireless networks
- Network security monitor: see Intrusion detection systems
- Network Security Monitoring
- Network and Systems Management (NSM) (a Suite of Network and Computer Management software made by Computer Associates
- N-ary Storage Model, a model to storage records in database management systems
In Architecture:
- Net Square Meter
Other:
- Nasjonal Sikkerhetsmyndighet, the Norwegian National Security Authority
- Naval Strike Missile, a cruise missile developed by Kongsberg Defence & Aerospace 1997–2007