NSF

NSF may stand for:

Political organizations

 * National Socialist Front, a Swedish National Socialist party
 * NS-Frauenschaft, the women's wing of the former German Nazi party
 * National Students Federation, a leftist Pakistani students' political group
 * Norsk Syndikalistisk Forbund, a Norwegian anarcho-syndicalist group
 * National Salvation Front (disambiguation), various organizations
 * National Secessionist Forces, a fictional rebel group in the video game Deus Ex

Other organizations

 * Naga Students' Federation, student organization of the Naga people
 * National Science Foundation, a United States government agency
 * National Service Framework, one of various British health policies
 * National Sleep Foundation, a U.S. nonprofit organization that promotes public understanding of sleep and sleep disorders
 * NSF International, formerly the National Sanitation Foundation, a food safety standards group
 * North Sea Fleet
 * North South Foundation, an Indian-American educational organization
 * Nykterhetsrörelsens Scoutförbund, a Swedish scouting organization
 * Norges Speiderforbund, a Norwegian scouting organization
 * Palestinian National Security Forces
 * NASASpaceFlight.com, a news website and forum covering spaceflight and aerospace engineering news
 * Nederlandsche Seintoestellen Fabriek, defunct radio and television transmitter company in the Netherlands

Medicine

 * Nephrogenic systemic fibrosis, a disease
 * N-ethylmaleimide sensitive fusion protein, an enzyme and gene

Computing

 * NES Sound Format (.nsf), an audio file format for the Nintendo Entertainment System
 * Notes Storage Facility (.nsf), the file type for IBM Lotus Notes databases

Other uses

 * Non-sufficient funds, a cause for a bank to reject a check
 * New Small Family, an automobile model range
 * National Service Full-time, a type of conscription in Singapore
 * Thiazyl fluoride, an unstable gas with the chemical formula
 * NSF, one of the call signs used by the radio station at the Anacostia Naval Air Station in Washington, D.C.