What does DD stand for?

Direct Drive (vinyl record player drive system as opposed to belt drive)

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

Science, medicine, engineering, etc.

Other Resources:

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Samples in periodicals archive:

USB Turntables Available in the Market Numark TTX USB Digital Direct Drive Turntable This device has the premier torque professional grade turntable with USB.

More About USB Turntable Products and Tips

Naval Research Laboratory announced two major advances in the development of pure fusion energy with lasers: (1) direct drive target designs that show power plant class gains at KrF laser energies below 1 MJ, and (2) a discovery that has extended the durability of high-energy high-repetition rate KrF lasers.

Recent advances in Laser Fusion

Summary: France's Moulinex has announced the Gulf-wide launch of Masterchef 8000 that makes food and juice preparation easier than ever before with the introduction of the direct drive technology.

moulinex makes food and juice preparation easier

6 MW wind turbines with direct drive (DD) technology at a site in west Denmark.

Siemens to test DD turbines

5 PLI web tension and direct drive from individual AC motors.

Retroflex

Canada Blower introduces a new design of a centrifugal general ventilating fan - Square Fan, in direct drive and belt drive configurations.

New Design of Square Air Fan

The belt drive and the direct drive are the most common among which direct drive pumps last up to 500 hours or more.

How to Use A High Pressure Air Compressor

In the more mainstream audio marketing path we find some direct drive tables.

A sensible look at vinyl playback