EM

EM, Em or em may refer to:

Music

 * EM, the E major musical scale
 * Em, the E minor musical scale
 * Electronic music, music that employs electronic musical instruments and electronic music technology in its production
 * Encyclopedia Metallum, an online metal music database
 * Eminem, American rapper

Other uses in arts and entertainment

 * Em (comic strip), a comic strip by Maria Smedstad

Companies and organizations

 * Em (restaurant), a restaurant in Mexico City
 * Aero Benin (IATA code), a defunct airline
 * Empire Airlines (IATA code), a charter and cargo airline based in Idaho, US
 * Erasmus Mundus, an international student-exchange program
 * Estado de Minas, a Brazilian newspaper
 * European Movement, an international lobbying association
 * ExxonMobil, a large oil company formed from the merger of Exxon and Mobil in 1999
 * La République En Marche! (sometimes shortened to "En Marche!"), a major French political party

Economics

 * Emerging markets, nations undergoing rapid industrialization

Language

 * M, a letter of the modern Latin alphabet, in English and other languages
 * Em (Cyrillic) (М / м), a letter of the Cyrillic alphabet
 * Em (digraph), a digraph in Portuguese
 * Em, the third-person singular oblique Spivak pronoun

Typography

 * em (typography), a unit of measurement
 * em dash, a dash that is one em wide
 * em space or mutton, a space that is one em wide

Management

 * Emergency management, a discipline that studies dealing with and avoiding risks
 * Energy management, planning and operation of energy production and energy consumption units
 * Environmental management, the management of the interaction of human societies with the environment

Places

 * El Monte, California, a city in the United States
 * El Monte, Chile, a city in Chile

Biology

 * Effective microorganisms, a series of products intended to improve soil quality and plant growth
 * Extracellular matrix, the connective tissue supporting cells in multicellular organisms
 * Membrane potential (Em), of a cell

Computing

 * , emphasis HTML element
 * End of medium, ISO C0 control code ^Y
 * Empirical modelling
 * em (typography), a unit of measurement in Web design
 * eM Client E-Mail client

Medicine

 * Emergency medicine, a medical specialty dealing with acute illnesses and injuries that require immediate attention
 * Erythema multiforme, a skin condition that usually follows an antecedent infection or drug exposure
 * Erythromelalgia, a disorder that typically affects the skin of the feet and/or hands, causing redness, heat and pain
 * Extensive metabolizer, a term used in pharmacogenomics to refer to individuals with normal metabolic activity

Physics

 * Exametre or exameter (Em), an SI unit of length equal to 1018 metres
 * Electromagnetic spectrum, the range of all possible frequencies of electromagnetic radiation
 * Electromigration, the transport of conducting solid material caused by electric current through it
 * Electromagnetism, one of the fundamental physical forces
 * Electromechanics, combines electrical engineering and mechanical engineering

Other uses in science and technology

 * Nikon EM, an SLR camera made by the Nikon Corporation in the late 1970s
 * Electron microscope, a type of microscope that uses electrons to "illuminate" a specimen and create an enlarged image
 * Electron multiplier, a vacuum-tube structure that multiplies incident charges by means of secondary emission
 * Electronic monitoring, a form of surveillance used in criminal justice
 * Atlantic Equatorial mode, a climate pattern of the Atlantic Ocean
 * Expectation–maximization algorithm, an algorithm for finding maximum likelihood estimates of parameters in probabilistic models

Other uses

 * Electrician's mate, an occupational rating in the U.S. Navy and U.S. Coast Guard
 * David Em (born 1952), an American computer art pioneer
 * EM gauge, a scale used in model railways
 * Etymologicum Magnum, in the bibliography of the largest Byzantine lexicon