DD, dd, or other variants may refer to:

Arts and entertainment

*"D.D.", track from the mixtape '' Echoes of Silence'' by the Weeknd * DD (character), a character in ''The Saga of Seven Suns'' novels by Kevin J. Anderson * DD National or DD1, an Indian national television channel * Dancing Dolls, a Japanese all-female pop group * Dhivyadharshini, Indian television host and actress, known as DD * Daredevil (Marvel Comics character), a Marvel Comics character ** Matt Murdock (Marvel Cinematic Universe), the Marvel Cinematic Universe counterpart * Decorative Designers * Donegal Daily, an Irish news website * Doordarshan, a public service broadcaster in India * Erann DD, a Danish singer and songwriter *DD, the production code for the 1966 ''Doctor Who'' serial '' The Tenth Planet'' * ''Dhilluku Dhuddu'' franchise, Indian film series **'' Dhilluku Dhuddu'' (2016), the first instalment in the ''Dhilluku Dhuddu'' series **'' Dhilluku Dhuddu 2'' (2019), the second instalment in the ''Dhilluku Dhuddu'' series **'' DD Returns'' (2023), the third instalment in the ''Dhilluku Dhuddu'' series **'' Devil's Double Next Level'' (2025), the fourth instalment in the ''Dhilluku Dhuddu'' series *"Double D'z" (2022), a song by Black Eyed Peas from ''

Elevation The elevation of a geographic location (geography), ''location'' is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational equipotenti ...

'' *Edd, commonly known as Double-D, a character from ''

Ed, Edd n Eddy '' Ed, Edd n Eddy'' is an animated television series created by Danny Antonucci for Cartoon Network. The series revolves around three friends named Ed, Edd (nicknamed "Double D" to avoid confusion with Ed), and Eddy—collectively known as "th ...

Business

DuPont Dupont, DuPont, Du Pont, duPont, or du Pont may refer to: People * Dupont (surname) Dupont, also spelled as DuPont, duPont, Du Pont, or du Pont is a French surname meaning "of the bridge", historically indicating that the holder of the surname re ...

, which trades shares on the New York Stock Exchange as DD *

Dunkin' Donuts DD IP Holder LLC, doing business as Dunkin', and originally Dunkin' Donuts, is an American multinational coffee and doughnut company, as well as a quick service restaurant. It was founded by Bill Rosenberg in Quincy, Massachusetts, in 19 ...

, a coffee and doughnut company *

Data Disc Data Disc, Incorporated, was a public American computer hardware company active from 1962 to 1977 and based in Silicon Valley. The company primarily manufactured hard disk drive units for Mainframe computer, mainframes and minicomputers. The compa ...

* ''Dioničko društvo'' (d.d. or D.D.), a type of

Joint-stock company A joint-stock company (JSC) is a business entity in which shares of the company's stock can be bought and sold by shareholders. Each shareholder owns company stock in proportion, evidenced by their shares (certificates of ownership). Shareho ...

in Bosnian and Croatian languages

Military

DD tank DD or duplex drive tanks, nicknamed "Donald Duck tanks", were a type of amphibious vehicle, amphibious swimming tank developed by the British during the Second World War. The phrase is mostly used for the Duplex Drive variant of the M4 Sherman ...

, an amphibious tank *

Dishonorable discharge A military discharge is given when a member of the armed forces is released from their obligation to serve. Each country's military has different types of discharge. They are generally based on whether the persons completed their training and the ...

, a punitive discharge in the U.S. military * DD, the U.S. Navy hull classification for

destroyer In naval terminology, a destroyer is a fast, maneuverable, long-endurance warship intended to escort larger vessels in a fleet, convoy, or carrier battle group and defend them against a wide range of general threats. They were conceived i ...

s *

DD Form 214 The DD Form 214, Certificate of Release or Discharge from Active Duty, generally referred to as a "DD 214", is a document of the United States Department of Defense, issued upon a military service member's retirement, separation, or discharge from ...

, a form used by the U.S. Defense Department

Places

DD postcode area The DD postcode area, also known as the Dundee postcode area,Royal Mail, ''Address Management Guide'', (2004) is a group of eleven postcode districts in eastern Scotland, within nine post towns. These cover Dundee and Angus (including Forfar, Ar ...

, in Scotland * .dd, a hypothetical domain name for the German Democratic Republic *

Dresden Dresden (; ; Upper Saxon German, Upper Saxon: ''Dräsdn''; , ) is the capital city of the States of Germany, German state of Saxony and its second most populous city after Leipzig. It is the List of cities in Germany by population, 12th most p ...

, Germany (license plate code DD) *

Daman and Diu Daman and Diu (; ) was a union territory in northwestern India. With an area of , it was the smallest administrative subdivision of India on the mainland. The territory comprised two districts, Daman and Diu Island, geographically separated ...

, a former union territory of India, now part of Dadra and Nagar Haveli and Daman and Diu

Science and technology

Computing

* , an

HTML element An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (there are also text nodes, comment nodes and others). The first used version of HTML was written by Tim Berners-Lee in 199 ...

for specifying definition data *

dd (Unix) dd is shell command for reading, writing and converting file data. Originally developed for Unix, it has been implemented on many other environments including Unix-like operating systems, Windows, Plan 9 and Inferno. The command can be used ...

, a program that copies and converts files and data *

Deckadance Deckadance (often referred to as DD) is a DJ console and mixing tool developed by Image-Line software and acquired in 2015 by Gibson. Initially released in May 2007, it operates on Windows and Mac OS X, and comes in a House Edition and Club Ed ...

, a DJ program for Windows and Mac OS X designed by Image-Line * Deployment descriptor, a component in Java Platform, Enterprise Edition applications * Logo for

Dolby Digital Dolby Digital, originally synonymous with Dolby AC-3 (see below), is the name for a family of audio compression technologies developed by Dolby Laboratories. Called Dolby Stereo Digital until 1995, it is lossy compression (except for Dolby Tr ...

, audio compression technologies developed by Dolby Laboratories *

Double density Disk density is a capacity designation on magnetic storage, usually floppy disks. Each designation describes a set of characteristics that can affect the areal density of a disk or the efficiency of the encoded data. Such characteristics includ ...

, a capacity designation on magnetic storage, usually floppy disks * Debian Developer, the traditional full-membership role in

Debian Debian () is a free and open-source software, free and open source Linux distribution, developed by the Debian Project, which was established by Ian Murdock in August 1993. Debian is one of the oldest operating systems based on the Linux kerne ...

Other uses in science and technology

Data Deficient A data deficient (DD) species is one which has been categorized by the International Union for Conservation of Nature (IUCN) as offering insufficient information for a proper assessment of conservation status to be made. This does not necessaril ...

, a rating on the IUCN Red List of Threatened Species *

Decimal degrees Decimal degrees (DD) is a notation for expressing latitude and longitude geographic coordinates as decimal fractions of a degree. DD are used in many geographic information systems (GIS), web mapping applications such as OpenStreetMap, and GPS ...

, geographic coordinates shown using decimal fractions *

Death domain The death domain (DD) is a protein interaction module composed of a bundle of six alpha helix, alpha-helices. DD is a subclass of protein structural motif , motif known as the death fold and is related in sequence and structure to the death effecto ...

, a protein-interaction module, a subclass of the death fold protein motif *

DD Index Democracy-Dictatorship (DD), index of democracy and dictatorship or simply the DD index or the DD datasets was the binary measure of democracy and dictatorship whose publication stopped in 2008. Originally proposed by Adam Przeworski, and f ...

, for ''Democracy-Dictatorship Index'' * Abbreviation for

dolichospondylic dysplasia 3-M syndrome or 3M3 is a rare hereditary disorder characterized by severe growth retardation, Facial dysmorphism, facial dysmorphia, and skeletal abnormalities. The name 3-M is derived from the initials of the three researchers who first identif ...

, a genetic syndrome *

Developmental disability Developmental disability is a diverse group of chronic conditions, comprising mental or physical impairments that arise before adulthood. Developmental disabilities cause individuals living with them many difficulties in certain areas of life, espe ...

, or developmentally disabled, a diverse group of chronic conditions due to mental or physical impairments arising before adulthood *

Deuterium-deuterium fusion Fusion power is a proposed form of power generation that would generate electricity by using heat from nuclear fusion reactions. In a fusion process, two lighter atomic nuclei combine to form a heavier nucleus, while releasing energy. Devices d ...

, a type of nuclear fusion

Sports

* Delhi Daredevils, former name of

Delhi Capitals The Delhi Capitals, formerly the Delhi Daredevils, also known as DC, are a professional Twenty20 cricket team based in Delhi that competes in the Indian Premier League (IPL). The franchise is owned by GMR Group and JSW Sports. Its home groun ...

Delhi Dynamos FC Odisha Football Club () is an Indian professional football club based in Bhubaneswar, Odisha, that competes in the Indian Super League, the top flight of Indian football. Prior to the inaugural Indian Super League season, the club was founded ...

, an Indian Super League franchise, now Odisha FC

Transportation

, an amphibious tank * D-D locomotive, the AAR classification for a railway locomotive with two four-axle bogies * Danish Air Lines, former airline * Invincible D-D, a prototype aircraft *

Nok Air Nok Airlines plc, trading as Nok Air (; , from [] meaning 'bird') is a low-cost airline in Thailand operating mostly domestic services from Bangkok's Don Mueang International Airport. History Nok Air was established in February 2004 as Sky A ...

, a low-cost airline based in Thailand * Victorian Railways Dd class, a class of steam locomotives in Australia

Other uses

* DD, a

brassiere measurement Bra size (also known as brassiere measurement or bust size) indicates the size characteristics of a bra to accurately fit the breasts. While there are a number of bra sizing systems in use around the world, the bra sizes usually consist of a num ...

Dd (digraph) This is a list of digraphs used in various Latin alphabets. In the list, letters with diacritics are arranged in alphabetical order according to their base, e.g. is alphabetised with , not at the end of the alphabet, as it would be in Danish, ...

, in the Welsh language * Daniel Defense, a firearms manufacturer * Degree of difficulty, in several sports *

Demand draft A demand draft (DD) is a negotiable instrument similar to a bill of exchange. A bank issues a demand draft to a client (drawer), directing another bank (drawee) or one of its own branches to pay a certain sum to the specified party (payee). A d ...

, a negotiable instrument issued by the bank *

Deputy Director (disambiguation) Deputy Director is a job title used in many organizations around the world for a deputy for a director, and may refer to: * Deputy Director, a general rank below director within His Majesty's Civil Service; see Grading schemes * Deputy Director of ...

, a rank in some organizations *

Designated driver The terms "designated driver" and "designated driving" (commonly known as DD) refer to the selection of a person who remains sober as the responsible driver of a vehicle whilst others have been allowed to drink alcoholic beverages. Thus, as a pr ...

, a person who remains sober as the responsible driver *

Doctor of Divinity A Doctor of Divinity (DD or DDiv; ) is the holder of an advanced academic degree in divinity (academic discipline), divinity (i.e., Christian theology and Christian ministry, ministry or other theologies. The term is more common in the Englis ...

, an academic degree *

Dine and dash Dine may refer to: People named Dine Surname * Fiqri Dine (died 1960), Prime Minister of Albania's Quisling government under Nazi Germany and chieftain of the Dine clan from Debar * Jim Dine (born 1935), American pop artist * Nancy Dine (1937 ...

, a form of theft by fraud *

Direct debit A direct debit or direct withdrawal is a financial transaction in which one organisation withdraws funds from a payer's bank account. Formally, the organisation that calls for the funds ("the payee") instructs their bank to collect (i.e., debit) ...

, a way of paying bills * Double Diamond Burton Pale Ale