title: ATD
text: # ATD
  
  ATD may refer to:
  
  ## Computing and technology
  
  * Anthropomorphic test device, also known as a crash test dummy
  * at (command) 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, estrogen inhibitor
  * Acute tryptophan depletion
  * Anti-thyroid drugs or antithyroid agent
  
  ## Other uses
  
  * ATD Fourth World
  * Against the Day, a Thomas Pynchon novel
  * Association for Talent Development
  * Attention to Detail, a defunct British video game developer
  * the postal code of Attard, Malta
  