DD, dd, or other variants may refer to:

Arts and entertainment

*"D.D.", a track on mixtape ''

Echoes of Silence ''Echoes of Silence'' is the third mixtape by Canadian singer the Weeknd, released on December 21, 2011, by XO. Like his debut mixtape ''House of Balloons'' and his second mixtape '' Thursday'', the Weeknd collaborated with musician Illangelo; ...

'' by The Weeknd *

DD (character) The following is a list of characters featured in ''The Saga of Seven Suns'', a series of science fiction novels written by Kevin J. Anderson from 2002 to 2008. For characters in the sequel trilogy '' The Saga of Shadows'', see List of ''The Sag ...

, a character in ''The Saga of Seven Suns'' novels by Kevin J. Anderson *

DD National DD National (formerly DD1) is a state-owned public entertainment television channel in India. It is the flagship channel of Doordarshan, India's public service broadcaster, and the oldest and most widely available terrestrial television channe ...

or DD1, an Indian national television channel * Dancing Dolls, a Japanese all-female pop group *

Daredevil (Marvel Comics character) Daredevil is a fictional character appearing in American comic books published by Marvel Comics. Daredevil was created by Literary editor, writer-editor Stan Lee and artist Bill Everett, with an unspecified amount of input from Jack Kirby. The c ...

, a Marvel Comics character **

Matt Murdock (Marvel Cinematic Universe) Matthew "Matt" Murdock is a fictional character primarily portrayed by Charlie Cox in the Marvel Cinematic Universe (MCU) media franchise, based on the Marvel Comics character of the same name—commonly known by his alias, Daredevil. In t ...

, the Marvel Cinematic Universe counterpart *

Decorative Designers Decorative Designers AKA "DD" (1895–1931) was an American firm of artists, each of whom designed various aspects of books and other publications, "an early example of division of labor in creative work." The "DD" monogram appears on more than ...

Donegal Daily Donegal Daily is a news website based in County Donegal, north-west Ireland. The sports editor is Chris McNulty, who also edits the related Donegal Sport Hub website. Other websites have cited Donegal Daily as a source, as have several newspape ...

, an Irish news website *

Doordarshan Doordarshan (abbreviated as DD; Hindi: , ) is an Indian public service broadcaster founded by the Government of India, owned by the Ministry of Information and Broadcasting and one of Prasar Bharati's two divisions. One of India's largest b ...

, a public service broadcaster in India *

Erann DD Erann David Drori ( he, ערן דוד דרורי; born in Copenhagen, Denmark on 7 September 1967), better known as Erann DD, is a Danish singer and songwriter of Yemeni-Jewish origin. As a 12-year-old, Erann was sent to a religious school in Is ...

, a Danish singer and songwriter *DD, the production code for the 1966 ''Doctor Who'' serial ''

The Tenth Planet ''The Tenth Planet'' is the partly missing second serial of the fourth season in the British science fiction television series '' Doctor Who'', which was first broadcast in four weekly parts from 8 to 29 October 1966. It was William Hartn ...

Business

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

Dunkin' Donuts Dunkin' Donuts LLC, also known as Dunkin' and by the initials DD, is an American multinational coffee and doughnut company, as well as a quick service restaurant. It was founded by William Rosenberg, Bill Rosenberg (1916–2002) in Quincy, Mas ...

, a company

Military

DD tank DD or Duplex Drive tanks, nicknamed "Donald Duck tanks", were a type of 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 medium tank, that wa ...

, 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 destroyers * DD Form 214, 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, A ...

, in Scotland *

.dd .dd was the assigned country code top-level domain (ccTLD) for the German Democratic Republic (East Germany). It was chosen based on the ISO 3166-1 alpha-2 code for the German Democratic Republic, the letters coming from the German name of the coun ...

, a hypothetical domain name for the German Democratic Republic *

Dresden Dresden (, ; Upper Saxon: ''Dräsdn''; wen, label=Upper Sorbian, Drježdźany) is the capital city of the German state of Saxony and its second most populous city, after Leipzig. It is the 12th most populous city of Germany, the fourth ...

, Germany (license plate code DD)

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 1993 ...

for specifying definition data *

dd (Unix) dd is a command-line utility for Unix, Plan 9, Inferno, and Unix-like operating systems and beyond, the primary purpose of which is to convert and copy files. On Unix, device drivers for hardware (such as hard disk drives) and special device fi ...

, 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 E ...

, a DJ program for Windows and Mac OS X designed by Image-Line *

Deployment descriptor A deployment descriptor (DD) refers to a configuration file for an artifact that is deployed to some container/engine. In the Java Platform, Enterprise Edition, a deployment descriptor describes how a component, module or application (such as a w ...

, a component in Java Platform, Enterprise Edition applications * Logo for

Dolby Digital Dolby Digital, originally synonymous with Dolby AC-3, is the name for what has now become a family of audio compression (data), audio compression technologies developed by Dolby Laboratories. Formerly named Dolby Stereo Digital until 1995 in film, ...

, 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 (), also known as Debian GNU/Linux, is a Linux distribution composed of free and open-source software, developed by the community-supported Debian Project, which was established by Ian Murdock on August 16, 1993. The first version of De ...

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 necessarily ...

, 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 d ...

, geographic coordinates shown using decimal fractions *

Death domain Death is the irreversible cessation of all biological functions that sustain an organism. For organisms with a brain, death can also be defined as the irreversible cessation of functioning of the whole brain, including brainstem, and brain ...

, 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 refers to the binary measure of democracy and dictatorship first proposed by Adam Przeworski ''et al.'' (2010), and further developed a ...

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

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

, 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, a type of nuclear fusion

Sports

* Delhi Daredevils, former name of

Delhi Capitals Delhi Capitals (formerly Delhi Daredevils) are a franchise cricket team based out of Delhi in the Indian Premier League (IPL). The franchise is jointly owned by the GMR Group and the JSW Group. The team's home ground is Arun Jaitley Stadium ...

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 wheel arrangement system is a method of classifying locomotive (or unit) wheel arrangements that was developed by the Association of American Railroads. Essentially a simplification of the European UIC classification, it is widely used in ...

, the AAR classification for a railway locomotive with two four-axle bogies *

Danish Air Lines Det Danske Luftfartselskab A/S or DDL, trading in English as Danish Air Lines, was Denmark's national airline from 1918 until it merged to create Scandinavian Airlines System (SAS) in 1951. DDL was established on 29 October 1918, but started it ...

, an airline * Invincible D-D, a prototype aircraft *

Nok Air Nok Air (, th, นกแอร์, derived from ''nok'' (นก), the Thai word for ''bird'') is a low-cost airline in Thailand operating mostly domestic services out of Bangkok's Don Mueang International Airport. Thai Airways International ow ...

, a low-cost airline based in Thailand *

Victorian Railways Dd class Victorian or Victorians may refer to: 19th century * Victorian era, British history during Queen Victoria's 19th-century reign ** Victorian architecture ** Victorian house ** Victorian decorative arts ** Victorian fashion ** Victorian litera ...

, 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. While there are a number of bra sizing systems in use around the world, the bra sizes usually consist of a number, indicating the size of th ...

Dd (digraph) This is a list of digraphs used in various Latin alphabets. Capitalisation involves only the first letter (''ch'' becomes ''Ch'') unless otherwise stated (''ij'' becomes ''IJ''). Letters with diacritics are arranged in alphabetic order accordi ...

, in the Welsh language *

Degree of difficulty Degree of difficulty (DD, sometimes called tariff or grade) is a concept used in several sports and other competitions to indicate the technical difficulty of a skill, performance, or course, often as a factor in scoring. Sports which incorporate ...

, 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 dema ...

, 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 Civil Service (United Kingdom)#Gradin ...

, 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 prac ...

, a person who remains sober as the responsible driver *

Doctor of Divinity A Doctor of Divinity (D.D. or DDiv; la, Doctor Divinitatis) is the holder of an advanced academic degree in divinity. In the United Kingdom, it is considered an advanced doctoral degree. At the University of Oxford, doctors of divinity are ra ...

, an academic degree *

Dine and dash Dine and dash is the US phrase for a form of theft by fraud, in which a patron or patrons orders and consumes food and beverages from a restaurant or similar establishment with the intent not to pay. The act may involve the customer leaving the ...

, 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., https://www.directdebit.co.uk/direct-debit-explained/what-is-direct-debit/ Formally, the organisation that calls f ...

, a way of paying bills