DOI

DOI or DoI may refer to:

• Doi (surname), a Japanese surname
• The Bengali term for Yoghurt
• Doi (retailer), or Camera no Doi, a Japanese company
• Digital object identifier, a persistent identifier given to objects
• United States Department of the Interior, a department of the United States government that manages federally-owned land
• New York City Department of Investigation, an agency of the New York City government
• Division of Investigation, a precursor to the Federal Bureau of Investigation in the United States
• Declaration of independence, a proclamation or assertion of national independence
• Declaration of interests (declaration of financial interests), a means of publicizing public officials' potential conflicts of interest
• Diffusion of innovations, a theory explaining the spread of new technology
• Distinctness of image, a quantification of the deviation of the direction of light propagation by scattering during transmission or reflection
• 2,5-Dimethoxy-4-iodoamphetamine, a hallucinogenic drug
• Dancing on Ice (UK), a reality television show focussing on ice-skating
• Dogri language ISO 639 code
• Declaration of Interdependence, a manifesto for agile project management

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