EOI may refer to: Economics and commerce Economic Opportunity Institute, an American public policy think tank Export-oriented industrialization Expression of interest Other uses European Ombudsman Institute Belyayev EOI, a Soviet fighter aircraft Eday Airport, in Orkney, Scotland EOI Business School, in Spain End of interrupt, a computer signal Escuela Oficial de Idiomas, a Spanish network of language schools Exhaust over intake, a type of combustion engine See also Encyclopaedia of Islam (EI)