DEI may refer to: Business and organisations Dale Earnhardt, Inc., a NASCAR team Dayalbagh Educational Institute, in Agra, India Directed Electronics, Inc., American manufacturer of vehicle security systems Public Power Corporation, (Greek: Δημόσια Επιχείρηση Ηλεκτρισμού, Dimosia Epicheirisi Ilektrismou) the Greek national electrical company Senckenberg German Entomological Institute (formerly German Entomological Institute, German: Deutsches Entomologisches Institut), an entomological research institute in Germany Other uses Dei Rural LLG, a local government in Papua New Guinea DEI (Dabney Eats It), motto of Dabney House at Caltech, U.S. Diversity, equity, and inclusion, an organizational equality training term Doofenshmirtz Evil Incorporated, a fictional company Development Effectiveness Indicator, an effectiveness measure for development finance Benedetto Dei (1417–1492), Italian poet and historian See also Deus (disambiguation) (dei is the genitive singular of deus) Deus, the Latin word for "god" or "deity" Dutch East Indies