MEI
MEI may refer to: == Education == MEI Academy, an international school Mathematics in Education and Industry, 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), a manufacturer of cash handling systems Matsushita Electric Industrial Co., Ltd. Member of the Energy Institute (MEI) Meeting delle etichette indipendenti, an annual conference of Italian independent record labels == Government == Ministry of Economy and Innovation (Portuguese: Ministério da Economia e Inovação), the Portuguese economy ministry Middle East Institute Marginal efficiency of investment, or internal rate of return, a relationship between interest rate and amount of investment that can be profitable at a given time Montreal Economic Institute Medicare Economic Index Meridian Regional Airport (IATA code: MEI) Meridian Multi-Modal Transportation Center (Amtrak code: MEI) == Military == MEI Hellhound (Grenade), a low-velocity multipurpose grenade MEI Mercury, a family of grenades developed by Martin Electronics, Inc.