IEIEInstitute of Economics and Industrial Engineering
IEIEInternational Education Information Exchange (Germany)
IEIEInstituto de Estudios e Investigaciones Educativas
References in periodicals archive ?
Although the editors at Merriam-Webster did not include this word in the Third, I don't think they thereby intended to make a strong statement that IEIE is an English word and the other words are not.