SNS

SNS may refer to:

Science and technology

Strategic National Stockpile, the United States' national repository of antibiotics, vaccines, chemical antidotes, antitoxins, and other critical medical equipment and supplies
Social networking service or social networking site, a website with multiple users where one user can publish content
Stop 'N' Swop, a feature from the game Banjo-Kazooie
Somatic nervous system, a sub-part of the peripheral nervous system
Sympathetic nervous system, one of the three parts of the autonomous nervous system
Spallation Neutron Source, an accelerator-based neutron source being built in Oak Ridge, Tennessee, USA, by the U.S. Department of Energy
Supplemental Nursing System, a device used at the breast to provide additional milk to a nursing child

Scuola Normale Superiore, an Italian higher education institution
Stoke Newington School – Media Arts & Science College, a London comprehensive secondary school
Spanish National Health System (Sistema Nacional de Salud)
Société Nationale de Sauvetage en Mer, a French organization for search and rescue at sea, with vessels bearing "SNS"
Scotch'n'Soda, Carnegie Mellon University's student theatre organization
Symphony Nova Scotia, a professional symphonic orchestra based in Halifax, Nova Scotia, Canada
Special Night Squads, a former Jewish-British military unit