ATD may refer to:

Computing and technology

Anthropomorphic test device A crash test dummy, or simply dummy, is a full-scale anthropomorphic test device (ATD) that simulates the dimensions, weight proportions and articulation of the human body during a traffic collision. Dummies are used by researchers, automobile ...

, also known as a crash test dummy * '' at (command)'' or @daemon (spelled "atd", lower case), a standard Unix program *

Azimuth tractor drive An azimuth thruster is a configuration of marine propellers placed in pods that can be rotated to any horizontal angle (azimuth), making a rudder unnecessary. These give ships better maneuverability than a fixed propeller and rudder system. Ty ...

, a drive system for tugboats

Medicine and science

1,4,6-Androstatrien-3,17-dione 1,4,6-Androstatriene-3,17-dione (ATD) is a potent irreversible aromatase inhibitor that inhibits estrogen biosynthesis by permanently binding and inactivating aromatase in adipose and peripheral tissue. It is used to control estrogen synthesis. ...

, estrogen inhibitor * Acute tryptophan depletion * Anti-thyroid drugs or

antithyroid agent An antithyroid agent is a hormone antagonist acting upon thyroid hormones. The main antithyroid drugs are carbimazole (in the UK), methimazole (in the US), and propylthiouracil (PTU). A less common antithyroid agent is potassium perchlorate. G ...

Other uses

ATD Fourth World The International Movement ATD Fourth World is a nonprofit organization which aims towards the eradication of chronic poverty through a human-rights based approach. It works in partnership with communities across the world to end the exclusion an ...

* '' Against the Day'', a Thomas Pynchon novel *

Association for Talent Development Association may refer to: *Club (organization), an association of two or more people united by a common interest or goal *Trade association, an organization founded and funded by businesses that operate in a specific industry *Voluntary associatio ...

Attention to Detail Attention to Detail Ltd (ATD) was a British video game developer based in Hatton. Founded by University of Birmingham graduates in September 1988, it was acquired by Kaboom Studios in January 1997. The studio shut down in August 2003 due to f ...

, a defunct British video game developer * the postal code of Attard, Malta {{disambig