EM

EM, Em or em may refer to:

Cities

• El Monte, California, Los Angeles County, California, United States
• El Monte, Chile, Talagante Province, Santiago Metropolitan Region, Chile

Codes

EM is:

• Aero Benin, in IATA reservation code
• Empire Airlines, in IATA reservation code, a charter and cargo airline based in Idaho, US
• London Interbank Offered Rate futures contracts, in Reuters Instrument Code for the 1-month at the Chicago Mercantile Exchange

Computing

• <em>, the HTML tag for emphasis
• The typographical em unit as used in CSS
• End of Medium (^Y), an ISO C0 control code
• Empirical modelling
• Expectation maximization

Media

• Em (comic strip), a comic strip by Maria Smedstad featured daily in thelondonpaper till September 2009, and on Tuesdays and Wednesdays in The Sun since then
• Epic Movie, 2007 American comedy film
• Extreme Makeover, a former television program from ABC in which individuals volunteer to receive an extensive makeover in Hollywood

Music

• E major (EM) and E minor (Em), musical scales
• Electronic music, music that employs electronic musical instruments and electronic music technology in its production
• Eminem (a.k.a Slim Shady), an American rapper
• Encyclopaedia Metallum, an online metal music database

Organizations

• EM Microelectronics, a Swiss semiconductor manufacturer specialized in the design and production of ultra-low-power integrated circuits
• European Movement, an international lobbying association that coordinates the efforts of associations and private individuals desiring to work towards the construction of a united Europe
• Escuela Movil, a Mexican Research and Development Center specialized in storage of information inside fluids, and computing and telecommunications via fluids.

People

• David Em (born 1952), American computer art pioneer
• Ea Mikael (EM), Finnish musician

Science

Atmospheric sciences

• Atlantic Equatorial mode, a climate pattern of the tropical Atlantic Ocean analogous to the El Niño-Southern Oscillation

Biology

• Effective microorganisms, a brand name for a series of products intended to improve soil quality and plant growth by a (yet scientifically unconfirmed) method of using a mixture of microorganisms

Linguistics

• Em, the name of M / m, the thirteenth letter of the modern Latin alphabet, in English and other languages
  • Em (Cyrillic) (М / м), a letter of the Cyrillic alphabet that directly corresponds to the Latin alphabet letter "M" and is pronounced similarly
• Em (digraph), a digraph in Portuguese
• Em, the third-person plural objective Spivak pronoun

Mathematics

• Expectation-maximization algorithm, in statistics, an algorithm used for finding maximum likelihood estimates of parameters in probabilistic models

Medicine

• Emergency medicine, a specialty of medicine that focuses on the diagnosis and treatment of acute illnesses and injuries that require immediate medical attention
• Erythema multiforme, a skin condition that usually follows an antecedent infection or drug exposure

Physics

• Electromagnetism:
  • A fundamental physical force that is responsible for interactions between charged particles
  • Magnetism developed by an electrical current (such as in an electromagnet)

• Electromagnetic force:
  • The force that the electromagnetic field exerts on electrically charged particles

Technology

• Electromigration, the transport of conducting solid material caused by electric current through it
• 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
• Exametre or exameter (Em), an SI unit of length equal to 10¹⁸ metres
• Nikon EM, an SLR camera made by the Nikon Corporation in the late 1970s

Typography

• Em (typography), a unit of measurement used in typography (and, consequently, web design), usually the height of the typeface (font) in question, but originally based on the width of its capital letter M, thus its name
  • Em dash (—), a dash which is one em wide
  • Em space ( ) or mutton, a space which is one em wide

Miscellaneous

• Em, a common short form of some given names, e.g. Emma, Emily, Emmett, Emmanuel, Emerson
• EM gauge, a variant of 1:76 scale used in model railways
• Emergency management, a discipline that studies dealing with and avoiding risks
• Emerging markets, a term used to describe a nation's social, or business activity in the process of rapid industrialization
• Environmental management, the management of interaction by the modern human societies with, and impact upon the environment
• ERASMUS Mundus, a students exchange program, the international counterpart of the ERASMUS programme
• Electrician's Mate, a rating in the U.S. Navy and U.S. Coast Guard