BMI may refer to:

Business

• Broadcast Music Incorporated, a collecting society for composers' copyrights
• Business Monitor International
• Baltimore Museum of Industry
• BMI (airline), a United Kingdom airline
• BMI Healthcare, a British healthcare company
• Bank Melli Iran, the first national Iranian bank
• Best Motoring International, a Japanese magazine and video series for automobiles and racing
• Birmingham and Midland Institute, England; not to be confused with the Birmingham Medical Institute, England.
• Central Illinois Regional Airport, IATA code BMI

Economics

• Big Mac Index, a measurement of purchasing power parity across different countries; popularized by The Economist

Government

• Bundesministerium des Innern, the Federal Ministry of the Interior (Germany)
• Bureau of Military Information of the Union Army

Health

• Body mass index, a numerical computation regarding height and weight

Organizations

• Black Mountain Institute, an international center dedicated to advancing literary and cross-cultural dialogue at UNLV

Science

• Biculculline methiodide, a GABA-A antagonist used in neuroscience research
• Brain Machine Interface, a technological interface between a brain and an artificial device

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