SM or sm may refer to:

Business and economics

* Service mark symbol () * Spesmilo ₷, a former international currency * Senior management

Organizations

* SM Entertainment, South Korean music label * SM Prime, a Philippine retail operator * SM Supermalls, Philippine chain of shopping malls * ''SM-liiga'', top Finnish men's ice hockey league * ''SM-sarja'', Finnish former top men's ice hockey league * ''Syndicat de la Magistrature'', a French union

Places

* SM postcode area, Greater London, England * San Marino, ISO country code * Satu Mare, Romania, vehicle registration

Science

Biology and medicine

* "Sm.", author abbreviation for "Smith", see List of taxonomic authorities named Smith * S.M. (patient), a patient with brain damage * James Edward Smith (botanist) (1759–1828), botanist cited as "Sm."

Computing

* .sm, San Marino top-level Internet domain * SM EVM, Soviet computers, e.g. SM-4 * Streaming Multiprocessor

Physics and chemistry

* Samarium, symbol Sm, a chemical element

Other sciences

* Magellanic spiral, a galaxy class * Selective mutism, an anxiety disorder

Titles, ranks, and awards

Military

* Sacrifice Medal, Canada * Sena Medal, India * Service member, a member of a branch of the military * Southern Cross Medal (1952), South Africa * Southern Cross Medal (1975), South Africa

Other titles, ranks, and awards

* Medal of Service of the Order of Canada, post-nominal letters * Scientiæ Magister or Master of Science * Studio manager, in media professions * Suomen mestaruus (Finnish Champion), sports award * Swedish Championship (disambiguation) (Swedish Champion), sports award

Transportation and other moving vehicles

* Citroën SM, a high-performance hatchback coupé * Prefix of some Savoia-Marchetti aircraft, e.g. SM.83 * Shanghai Metro * SM (motorcycle), defunct Polish motorcycle manufacturer * SM-class minesweeper, ''SM''-class minesweeper, a ship class of the Finnish Navy * Sm gauge, in rail transport modelling, a track gauge * Spec Miata, a class of racing car * Spirit of Manila Airlines, IATA airline code * St. Mary's Railroad, reporting mark * Standard Missile, a family of US missiles, e.g. SM-3 * Swedline Express, former IATA airline code. * A US Navy hull classification symbol: List of mine warfare vessels of the United States Navy#Submarine minelayers (SM), Submarine minelayer (SM) * Saviem SM, a range of medium-duty trucks

Other uses

* Sadomasochism (SM, S/M or S&M) * Samoan language (ISO 639-1 code ''sm'') * Social media * Stephen Malkmus (born 1966), singer of Pavement * Super Mario, video game series * Supplementary Member in a democratic voting system * Society of Mary (Marianists), Roman Catholic congregation * SM radar, US WWII radar * Scrum master, or SM * SM, an abbreviation for Samsung Mobile