DD

DD, dd, or other variants may refer to:

Arts and entertainment

DD National or DD1, an Indian national television channel
Dhivyadharshini, Indian television host and actress, known as DD
Matt Murdock (Marvel Cinematic Universe), a counterpart to the Daredevil comic book character
Doordarshan, a public service broadcaster in India
The Tenth Planet, a 1966 Doctor Who serial (production code "DD")
Dhilluku Dhuddu franchise, Indian film series
- Dhilluku Dhuddu (2016), the first instalment in the Dhilluku Dhuddu series
Edd, commonly known as Double-D, a character from Ed, Edd n Eddy

Daniel Defense, a firearms manufacturer
Data Disc
Decorative Designers, an artists firm
Dioničko društvo (d.d. or D.D.), a type of Joint-stock company in Bosnian and Croatian languages
Doordarshan, a public service broadcaster in India
DuPont, which trades shares on the New York Stock Exchange as DD
Dunkin' Donuts, a coffee and doughnut company

DD postcode area, in Scotland
Daman and Diu, a former union territory of India, now part of Dadra and Nagar Haveli and Daman and Diu
Dresden, Germany (license plate code DD)
German Democratic Republic (hypothetical domain name .dd)
South Sulawesi (vehicle registration prefix DD)

<dd></dd>, an HTML element for specifying definition data
dd (Unix), a program that copies and converts files and data
.dd, a hypothetical domain name for the German Democratic Republic
Deckadance, 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, audio compression technologies developed by Dolby Laboratories
Double density, a capacity designation on magnetic storage, usually floppy disks
Debian Developer, the traditional full-membership role in Debian

Data deficient, a rating on the IUCN Red List of Threatened Species
Decimal degrees, geographic coordinates shown using decimal fractions
Death domain, a protein-interaction module, a subclass of the death fold protein motif
DD Index, for Democracy-Dictatorship Index
Abbreviation for dolichospondylic dysplasia, a genetic syndrome
Developmental disability, 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

DD tank, an amphibious tank
D-D locomotive, the AAR classification for a railway locomotive with two four-axle bogies
Danish Air Lines, former airline (IATA code DD)
Invincible D-D, a prototype aircraft
Nok Air, a low-cost airline based in Thailand
Victorian Railways Dd class, a class of steam locomotives in Australia
South Sulawesi (vehicle registration prefix DD)