SEM

• 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 • 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 first 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 • Synthesizer Expansion Module, an Oberheim synthesizer • New Austrian tunnelling method or Sequential Excavation Method • Sports and exercise medicine