DDD or Triple D may refer to:
Science and medicine Defined daily dose, a World Health Organization statistical measure of drug use Degenerative disc disease, a common disorder of the lower spine Dense deposit disease, the preferred name for Membranoproliferative glomerulonephritis Type II Dichlorodiphenyldichloroethane, a breakdown product of DDT Dual pacing, dual sensing and dual response modes of a pacemaker Depersonalization-derealization disorder, a psychiatric disorder involving feelings of oneself or the world being unreal, distant, or detached
Computers and technology Data Display Debugger or GNU DDD, a popular graphical user interface for command-line debuggers Digital Divide Data, a social enterprise providing disadvantaged youths in Cambodia, Laos and Kenya with IT education and training Direct distance dialing, a method for telephone subscribers to call long-distance numbers without operator assistance DDD, the SPARS code for a CD that was recorded, mixed, and mastered digitally Domain-driven design, a methodology and set of priorities for programming Developer! Developer! Developer!, a series of community conferences for software developers 3D Systems (DDD), a company that makes devices for stereolithography or 3D printing
Arts and entertainment DDD (album), by Poster Children, 2000, named after the SPARS code "DDD" (Koda Kumi song), 2005 "DDD" (EXID song), 2017 "D.D.D.", a 2019 song by The Boyz Diners, Drive-Ins and Dives, an American food TV series David Dorfman Dance, an American dance company Def Dames Dope, Belgian pop group from 1990s
Other uses DDD, a bra size Delta Delta Delta, a national collegiate sorority Denali Destroyer Dolls, roller derby league based in Wasilla, Alaska Dictionary of Deities and Demons in the Bible, an academic reference work Destroy Dick December, an Internet challenge and follow-up to No Nut November Die-deterioration doubling, a minting error on coins Doe Triple-D, a make of tractor Dhaalu Airport, Dhaalu Atoll, Maldives, IATA code DDD Dongotono language of Southern Sudan, ISO 639-3 language code ddd Doomsday device, a hypothetical construction — usually a weapon or weapons system — which could destroy all life on a planet, particularly Earth, or destroy the planet itself, bringing "doomsday", a term used for the end of planet Earth.
See also King Dedede, a fictional character in Nintendo's Kirby video-game series Di Di Di, an album by Hang on the Box 3D (disambiguation) D3 (disambiguation) DDDD (disambiguation)