SEM

SEM or Sem can refer to:

Computing

 * Search engine marketing, promoting websites by increasing their visibility in search engine results
 * Security event manager, a security log tool used on data networks

Economics and management

 * Stock Exchange of Mauritius, the principal stock exchange of the island country of Mauritius
 * Strategic enrollment management, an element of planning for new growth at a university or college
 * Samsung Electro-Mechanics, a South Korean company

Energy

 * Single Electricity Market, the integration of the electricity sectors of the Republic of Ireland and Northern Ireland in a single market
 * Strategic energy management, continuous improvement process for energy efficiency based on behavioral change

Mathematics and statistics

 * Structural equation modeling, in data analysis
 * Simultaneous equations model, in econometrics
 * Standard error of the mean in statistics

Places

 * Craig Field (Alabama) (IATA code: SEM), a public airport four miles southeast of Selma, in Dallas County, Alabama
 * Sem, Ariège, a former commune in the Ariège department in southwestern France
 * Sem, Norway, a village in Tønsberg Municipality in Vestfold county, Norway
 * Sem Municipality, a former municipality in Vestfold county, Norway

Science and technology

 * Scanning electron microscope
 * Space Experiment Module, of the Freestar experiment on space shuttle Columbia
 * Synthesizer expansion module in an Oberheim Electronics synthesizer
 * Sistema Eléctrico de Magallanes, an electrical power grid of Chile
 * SEM, instrument (seismometer) of the Surface Science Platform (Kazachok) mission ExoMars 2022
 * A protecting group in organic chemistry, see 2-(trimethylsilyl)ethoxymethyl chloride (SEM-Cl)

Schools, organisations, societies

 * Society for Experimental Mechanics, an engineering professional organization.
 * The School of Ecclesiastic Music the school of Byzantine Music in Mount Lebanon
 * Swedish Evangelical Mission
 * Society for Ethnomusicology, an ethnomusicology in Indiana, US
 * Science and Engineering Magnet, a school in Dallas, Texas, US
 * S.E.M. Group civil engineering company based in South Australia
 * Steam Engine Makers' Society, early British trade union
 * Shandong Engineering Machinery, owned by Caterpillar Inc.
 * State Secretariat for Migration (Switzerland)

People

 * Shem or Sem, one of the sons of Noah, as depicted in the Bible
 * Sem (given name), a usually masculine given name
 * Sem (artist) (1863–1934), French caricaturist
 * Elise Sem (1870–1950), Norwegian barrister, women's activist, and sports official
 * Ingebjørg Dahl Sem (born 1938), Norwegian Christian writer
 * Ingebjørg Sem (1931–2009), Norwegian actress
 * John Sem (born 1973), Papua New Guinean Olympic boxer
 * Niels Arntzen Sem (1782–1859), Norwegian politician
 * Suy Sem (born 1947), Cambodian politician

Other

 * Super Étendard Modernisé, a French fighter aircraft
 * Self-evaluation maintenance theory, a psychological theory of self
 * New Austrian tunnelling method or Sequential Excavation Method
 * Sports and exercise medicine