DID, DiD or did may refer to:
Arts and entertainment Dance India Dance, an Indian reality dance show from 2009 Dog Is Dead, a five-piece indie pop band from Nottingham, England
Businesses and organisations Digital Image Design, a British video game developer Développement International Desjardins, a subsidiary of Desjardins Group
Medical Dissociative identity disorder, previously known as multiple personality disorder (MPD), a dissociative disorder characterized by the presence of at least two personality states or "alters"
Science and technology Did, Bowers acronym for a dodecadodecahedron Data item descriptions, a specification used by United States Department of Defense contractors Decentralized identifier, a type of globally unique identifier Difference in differences, a statistical technique Direct inward dialing, in telephony Discharge ionization detector, a detector in gas chromatography
Other uses Past tense of the English verb do, which may serve as an auxiliary verb; see Do-support Didcot Parkway railway station, England, station code DID
See also