MCI may refer to:

Organizations

Companies

MCI Communications MCI Communications Corporation (originally Microwave Communications, Inc.) was an American telecommunications company headquartered in Washington, D.C. that was at one point the second-largest long-distance provider in the United States. ...

, originally Microwave Communications Inc., the corporation that operated as MCI from 1963 to 1998 *

MCI Inc. MCI, Inc. (formerly WorldCom and MCI WorldCom) was a telecommunications company. For a time, it was the second-largest long-distance telephone company in the United States, after AT&T. WorldCom grew largely by acquiring other telecommunicatio ...

, formerly called WorldCom, which acquired MCI Communications, and was later acquired by Verizon Communications *

Mobile Telecommunication Company of Iran Mobile may refer to: Places * Mobile, Alabama, a U.S. port city * Mobile County, Alabama * Mobile, Arizona, a small town near Phoenix, U.S. * Mobile, Newfoundland and Labrador Arts, entertainment, and media Music Groups and labels * Mobile ...

, the largest mobile phone operator in Iran * Motor Coach Industries, a coach/bus manufacturing company * Music Center Incorporated, later known as Music Consultants Incorporated, a company that manufactured multi-track audiotape recorders and mixing consoles for professional studio recording * Music Collection International, the music division of

Video Collection International 2 Entertain Video Limited, trading as BBC Studios Home Entertainment, is a British video and music publisher founded in 2004 following the merger of BBC Video and Video Collection International by BBC Worldwide and the Woolworths (United Kingd ...

* MCI,

Frank Farian Franz Reuther (18 July 1941 – 23 January 2024), known professionally as Frank Farian, was a German record producer and singer who founded the 1970s disco-pop group Boney M., the pop band No Mercy, and the pop band Milli Vanilli. He frequent ...

's record label

Education

* Maine Central Institute, a boarding school in Maine, US * Marine Corps Institute, a coursework of Marine Corps education and training programs *

Martingrove Collegiate Institute Martingrove Collegiate Institute is a semestered public secondary school in the Etobicoke district of Toronto, Ontario, Canada. It opened in 1966 and is currently overseen by the Toronto District School Board. Academics Gifted Program Marting ...

, a secondary school located in Toronto, Ontario, Canada *

Malvern Collegiate Institute Malvern Collegiate Institute (Malvern CI, MCI or Malvern), previously known as East Toronto High School and Malvern High School is a high school located in Toronto, Ontario, Canada part of the Toronto District School Board. Prior to 1998, it was ...

, a secondary school located in Toronto, Ontario, Canada * MCI Management Center Innsbruck, a privately organized business school in Innsbruck, Austria *

Medical Council of India The Medical Council of India (MCI) was a statutory body for establishing uniform and high standards of medical education in India until its dissolution on 25 September 2020 when it was replaced by National Medical Commission. The Council grante ...

, a statutory body regulating medical education in India * Mennonite Collegiate Institute, a private, religious school in the town of Gretna, in Southern Manitoba * Middlefield Collegiate Institute, a secondary school located in Markham, Ontario, Canada * Museum Conservation Institute, of the Smithsonian Institution

Other organisations

Ministry of Communications and Information The Ministry of Digital Development and Information (MDDI; ; zh, 数码发展及新闻部; ) is a ministry of the Government of Singapore responsible for overseeing the development of the infocomm technology, media and design sectors, as well ...

, a ministry of the Government of Singapore * Motek Cultural Initiative, a Toronto-based nonprofit organization promoting Israeli music and culture

Science and technology

* Millicurie (mCi), 1/1000 of a curie, a non-SI unit of radioactivity * Megacurie (MCi), 1,000,000 times a curie, a non-SI unit of radioactivity * Macroinvertebrate Community Index, an index where the presence or lack of macroinvertebrates is used for monitoring stream health in New Zealand * Magnetic current imaging, using a

scanning SQUID microscope Scan, SCAN or Scanning may refer to: Science and technology Computing and electronics * Graham scan, an algorithm for finding the convex hull of a set of points in the plane * 3D scanning, of a real-world object or environment to collect three dim ...

* Malicious caller identification, a type of enhanced telephone service *

Mass-casualty incident A mass casualty incident (often shortened to MCI) describes an incident in which emergency medical services resources, such as personnel and equipment, are overwhelmed by the number and severity of casualties. For example, an incident where a t ...

, a medical emergency involving more patients than can be easily handled by the crews initially assigned to the incident * Media Control Interface, an API for controlling multimedia peripherals connected to a Microsoft Windows or OS/2 computer *

Meta-circular evaluator In computing, a meta-circular evaluator (MCE) or meta-circular interpreter (MCI) is an interpreter which defines each feature of the interpreted language using a similar facility of the interpreter's host language. For example, interpreting a lambda ...

, in computing *

Mild cognitive impairment Mild cognitive impairment (MCI) is a diagnosis that reflects an intermediate stage of cognitive impairment that is often, but not always, a transitional phase from cognitive changes in normal aging to those typically found in dementia, especially ...

, a neurological affliction often associated with Alzheimer's disease * Modulation contrast imaging, a term related to

optical transfer function The optical transfer function (OTF) of an optical system such as a camera, microscope, human eye, or image projector, projector is a scale-dependent description of their imaging contrast. Its magnitude is the image contrast of the Sine and cosine ...

Arts, entertainment, and media

* MasterChef Indonesia, an Indonesian televised cooking competition

Other uses

* 1101 in Roman numerals *

Kansas City International Airport Kansas City International Airport (originally Mid-Continent International Airport) is a public airport in Kansas City, Missouri, located northwest of Downtown Kansas City in Platte County, Missouri., effective May 15, 2025. The airport was ...

(IATA airport code:MCI), Missouri, US *

Meal, Combat, Individual ration The Meal, Combat, Individual (MCI) was a United States military ration of canned and preserved food, issued from 1958 to 1980. It replaced the earlier C-ration, to which it was so similar to that it was often nicknamed the "C-ration", despite ...

, the successor to the US Army C-ration * Michigan City station (Amtrak station code), Indiana, US *

Miss Chinese International Pageant Miss Chinese International Pageant ( zh, 國際中華小姐競選, formerly 國際華裔小姐競選), or MCI ( zh, 華姐) for short, is an annual international beauty pageant, organized and broadcast by Television Broadcasts Limited, TVB, a net ...

, an annual pageant for international women of Chinese descent * Monetary conditions index, a macroeconomic index number relevant for monetary policy * Short name for

Manchester City F.C. Manchester City Football Club is a professional football club based in Manchester, England, that competes in the Premier League, the top flight of English football. Founded in 1880 as St. Mark's (West Gorton), they became Ardwick Assoc ...

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