DD, dd, or other variants may refer to:
Double data rate type three SDRAM (DDR3 SDRAM) is a type of synchronous dynamic random-access memory (SDRAM) with a high bandwidth ("double data rate") interface, and has been in use since 2007. It is the higher-speed successor to DDR and DDR2 and predecessor to DDR4 synchronous dynamic random-access memory (SDRAM) chips.
In computing, DDR4 SDRAM, an abbreviation for double data rate fourth-generation synchronous dynamic random-access memory, is a type of synchronous dynamic random-access memory (SDRAM) with a high bandwidth ("double data rate") interface.
In professional wrestling a DDT is any move in which the wrestler has the opponent in a front facelock/inverted headlock, and falls down or backwards to drive the opponent's head into the mat.
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.
Double data rate synchronous dynamic random-access memory (DDR SDRAM) is a class of memory integrated circuits used in computers.
DDRMAX Dance Dance Revolution 6thMix (DDRMAXダンスダンスレボリューションシックスミックス, Dī Dī Ā Makkusu Dansu Dansu Reboryūshon ShikkusuMikkusu), sometimes abbreviated as 6thMix (シックスミックス, ShikkusuMikkusu), is the 6th game in the Dance Dance Revolution series of music video games.
DDR2 SDRAM is a double data rate synchronous dynamic random-access memory interface. It superseded the original DDR SDRAM specification, and is superseded by DDR3 SDRAM (launched in 2007).
dd is a command-line utility for Unix and Unix-like operating systems whose primary purpose is to convert and copy files.
DD National (DD1) is a state-owned general interest terrestrial television channel in India. It is the flagship channel of Doordarshan, the Indian public service broadcasting corporation, and the most widely available terrestrial television channel in India.