MEI may refer to:

Education

MEI Academy MEI Academy (abbreviated as MEI) is a study abroad organization that specializes in experiential learning, academic coursework, and educational travel. Founded in 1997 by Joe and Rita Mei, the company aims to offer a global high school experience. ...

, an international school *

Mathematics in Education and Industry MEI (Mathematics in Education and Industry) is an independent educational charity and curriculum development body for mathematics education in the United Kingdom. Income generated through its work is used to support the teaching and learning of ...

, an examination board affiliated with the OCR examination board * Mennonite Educational Institute, an independent grades K-12 school in Abbotsford, British Columbia

Businesses

MEI (company) MEI Conlux (formerly known as Mars Electronics International) is a manufacturer of electronic banknote validators, coin acceptors and changers. MEI was spun off to private investment interests in July 2006. In December 2012, it was sold to Crane ...

, manufacturer of cash handling systems *

Matsushita Electric Industrial Co., Ltd. formerly between 1935 and 2008 and the first incarnation of between 2008 and 2022, is a major Japanese multinational conglomerate corporation, headquartered in Kadoma, Osaka. It was founded by Kōnosuke Matsushita in 1918 as a lightbulb s ...

* Micro Electronics, Inc. * Member of the Energy Institute (MEI) * , an annual conference of Italian independent record labels

Government

Ministry of Economy and Innovation The Ministry of Economy ( pt, Ministério da Economia) is a Portuguese government ministry. Portugal Economy An economy is an area of the production, distribution and trade, as well as consumption of goods and services. In general, it i ...

( pt, Ministério da Economia e Inovação), the Portuguese economy ministry * Middle East Institute * Marginal efficiency of investment or

internal rate of return Internal rate of return (IRR) is a method of calculating an investment’s rate of return. The term ''internal'' refers to the fact that the calculation excludes external factors, such as the risk-free rate, inflation, the cost of capital, or fin ...

, a relationship between interest rate and amount of investment that can be profitable at a given time *

Meridian Regional Airport Meridian Regional Airport is a joint civil-military public use airport located at Key Field, a joint-use public/military airfield. It is located southwest of Meridian, a city in Lauderdale County, Mississippi, United States. The Meridian Airpo ...

* Montreal Economic Institute *

Meridian (Amtrak station) Meridian or a meridian line (from Latin ''meridies'' via Old French ''meridiane'', meaning “midday”) may refer to Science * Meridian (astronomy), imaginary circle in a plane perpendicular to the planes of the celestial equator and horizon * ...

, Amtrak station code MEI, Mississippi, United States * Medicare Economic Index

Military

* MEI Hellhound (Grenade), low velocity multipurpose grenade * MEI Mercury, a family of grenades developed by Martin Electronics, Inc.

Science

* Iodomethane (methyl iodide, MeI), a halomethane *

Multivariate ENSO index The multivariate ENSO index, abbreviated as MEI, is a method used to characterize the intensity of an El Niño Southern Oscillation (ENSO) event. Given that ENSO arises from a complex interaction of a variety of climate systems, MEI is regarded as t ...

4-Methylimidazole 4-Methylimidazole (4-MeI or 4-MEI) is a heterocyclic organic chemical compound with molecular formula – or . It is formally derived from imidazole through replacement of the hydrogen in position 4 by a methyl group. It is a slightly yellowish ...

(4-MEI), a chemical compound

Technology

* Management Engine Interface, a component of Intel Active Management Technology * Music Encoding Initiative, a music encoding format

Other uses

Media and Entertainment International The Media and Entertainment International (MEI) was a global union federation representing workers in the arts. The federation was founded in 1993 with the merger of the International Secretariat of Arts, Communications, Media and Entertainment ...

, a former global union federation * '' OECD Main Economic Indicators'', a monthly publication of the Organisation for Economic Co-operation and Development