MCI 102DL3 & D4500

MCI may refer to:

Organization

Companies

* MCI Communications, originally Microwave Communications Inc., the corporation that operated as MCI from 1963 to 1998
* MCI Inc., formerly called WorldCom, which acquired MCI Communications, and was later acquired by Verizon Communications
* MCI Group, a global event, association management and congress management company
* Mobile Telecommunication Company of Iran, 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
* MCI, Frank Farian'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, a secondary school located in Toronto, Ontario, Canada
* MCI Management Center Innsbruck, a privately organized business school in Innsbruck, Austria
* 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

* Medical Council of India, a statutory body regulating medical education in India
* Ministry of Communications and Information, 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
* Malicious caller identification, a type of enhanced telephone service
* Mass-casualty incident, 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
* Mild cognitive impairment, a neurological affliction often associated with Alzheimer's disease
* Modulation contrast imaging, a term related to optical transfer function

Other uses

* 1101 in Roman numerals
* Kansas City International Airport (IATA airport code), Kansas City, Missouri, US
* Meal, Combat, Individual ration, the successor to the US Army C-ration
* Michigan City station (Amtrak station code), Indiana, US
* Miss Chinese International Pageant, 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.

{{disambiguation