SEM or Sem can refer to:

Computing

Search engine marketing Search engine marketing (SEM) is a form of Internet marketing that involves the promotion of websites by increasing their visibility in search engine results pages (SERPs) primarily through paid advertising. SEM may incorporate search engine op ...

, promoting websites by increasing their visibility in search engine results *

Security event manager Security event management (SEM), and the related Security information management, SIM and SIEM, are computer security disciplines that use data inspection tools to centralize the storage and interpretation of logs or events generated by other softwa ...

, 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 Structural equation modeling (SEM) is a diverse set of methods used by scientists for both observational and experimental research. SEM is used mostly in the social and behavioral science fields, but it is also used in epidemiology, business, ...

, in data analysis *

Simultaneous equations model Simultaneous equations models are a type of statistical model in which the dependent variables are functions of other dependent variables, rather than just independent variables. This means some of the explanatory variables are jointly determined ...

, in econometrics *

Standard error of the mean The standard error (SE) of a statistic (usually an estimator of a parameter, like the average or mean) is the standard deviation of its sampling distribution or an estimate of that standard deviation. In other words, it is the standard deviatio ...

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 A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons. The electrons interact with atoms in the sample, producing various signals that ...

* Space Experiment Module, of the Freestar experiment on space shuttle Columbia * Sistema Eléctrico de Magallanes, an electrical power grid of Chile * SEM, instrument (

seismometer A seismometer is an instrument that responds to ground displacement and shaking such as caused by quakes, volcanic eruptions, and explosions. They are usually combined with a timing device and a recording device to form a seismograph. The out ...

) of the Surface Science Platform (

Kazachok The ExoMars ''Kazachok'' (; formerly ExoMars 2020 Surface Platform) was a planned robotic Mars lander led by Roscosmos, part of the ExoMars 2022 joint mission with the European Space Agency. ''Kazachok'' translates as "Little Cossack", and is ...

) mission

ExoMars ExoMars (Exobiology on Mars) is an astrobiology programme of the European Space Agency (ESA). The goals of ExoMars are to search for signs of past life on Mars, investigate how the Martian water and geochemical environment varies, investigate ...

2022 * A protecting group in organic chemistry, see 2-(trimethylsilyl)ethoxymethyl chloride (SEM-Cl)

Schools, organisations, societies

Society for Experimental Mechanics Society for Experimental Mechanics (SEM) is a professional organization for engineers and scientists studying the design and implementation of experiments to characterize materials, structures, and systems. Formed in 1943 as the Society for Experim ...

, an engineering professional organization. * The School of Ecclesiastic Music the school of Byzantine Music in Mount Lebanon * Swedish Evangelical Mission *

Society for Ethnomusicology The Society for Ethnomusicology is, with the International Council for Traditional Music and thBritish Forum for Ethnomusicology one of three major international associations for ethnomusicology. Its mission is "to promote the research, study, an ...

, 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. Caterpillar Inc., also known as Cat, is an American construction, mining and other engineering equipment manufacturer. The company is the world's largest manufacturer of construction equipment. In 2018, Caterpillar was ranked number 73 on the ' ...

* State Secretariat for Migration (Switzerland)

People

Shem Shem (; ''Šēm''; ) is one of the sons of Noah in the Bible ( Genesis 5–11 and 1 Chronicles 1:4). The children of Shem are Elam, Ashur, Arphaxad, Lud and Aram, in addition to unnamed daughters. Abraham, the patriarch of Jews, Christ ...

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 Self-evaluation maintenance (SEM) concerns discrepancies between two people in a relationship. The theory posits an individual will maintain as well as enhance their self-esteem via a social comparison to another individual. Self-evaluation refer ...

, a psychological theory of self * Synthesizer Expansion Module, an Oberheim synthesizer * New Austrian tunnelling method or Sequential Excavation Method * Sports and exercise medicine {{disambig, surname