DDD

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

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, 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.