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 at the University of Michigan, a food safety standards group North Sea Fleet 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 , 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 NSF, one of the call signs used by the radio station at the Anacostia Naval Air Station in Washington, D.C.