ATD may refer to:

Computing and technology

* Anthropomorphic test device, also known as a crash test dummy * ''

at (command) In computing, at is a command in Unix-like operating systems, Microsoft Windows, and ReactOS used to schedule commands to be executed once, at a particular time in the future. Design Unix-like On Unix-like operating systems, at reads a series ...

'' or @daemon (spelled "atd", lower case), a standard Unix program * Azimuth tractor drive, 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 Acute tryptophan depletion (ATD) is a technique used extensively to study the effect of low serotonin in the brain. This experimental approach reduces the availability of tryptophan, an amino acid Amino acids are organic compounds that contai ...

* 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 ''Against the Day'' is an epic historical novel by Thomas Pynchon, published in 2006. The narrative takes place between the 1893 Chicago World's Fair and the time immediately following World War I and features more than a hundred characters spr ...

'', 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 Attard ( mt, Ħ'Attard) is a town in the Central Region, Malta, Central Region of Malta. Together with Balzan and Lija it forms part of "Three villages of Malta, the Three Villages" and has been inhabited since the Classical antiquity, Classic ...

, Malta {{disambig