What does DD stand for?

Duplex Drive

This definition appears very rarely and is found in the following Acronym Finder categories:

Military and Government
Science, medicine, engineering, etc.

Other Resources:

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Drydock Dual Damascene Dual Density Dual Diagnosis (clinical evaluation) Due Date Due Diligence Dumbledore (Harry Potter character) Dundee (postcode, United Kingdom) Dungeons & Dragons (fantasy game) Dunkin' Donuts		Duran Duran (band) Dutch Door (architectural drawings) Dynamic Dictionary Two-Digit Day (as in MM/DD/YYYY; e.g. 01/01/2000) Dimension Change During Atrial Contraction Phase Dolby Digital Ex (Extended Surround; developed by Lucasfilm THX and Dolby Laboratories) Department of Defense Form Depletion, Depreciation and Amortization Design Disclosure and Base Document Detail Design and Construction (Navy shipbuilding)

Samples in periodicals archive:

FURTHER to earlier replies, my tank regiment, the 25th Dragoons, pulled out of Burma in World War II and began to retrain for the invasion of Malaya using duplex drive Sherman tanks.

Vintage year for veteran footballers; ANSWERS TO CORRESPONDENTS

The 79th Armoured Division played a crucial role in the D-Day landings, deploying specially adapted tanks, developed by Hobart, including 'crabs' (with revolving chains to blow up mines), 'crocodiles' (with flame throwers), AVREs (with heavy mortars to blow up beach defences) and Duplex Drives (with canvas sides designed to 'swim' ashore from landing craft).

PERCY TANKS THROUGH THE RANKS; ANSWERS TO CORRESPONDANTS