Other Uses
- Danish language's ISO 639-1 alpha-2 code
- District attorney, a United States Attorney or County attorney
- Doctor of Arts degree
- Doomsday argument, a probabilistic argument based on demographics predicting how many people will be born
- Double-action, a firearm operation mechanism in which the trigger both cocks and releases the hammer
- Duck's ass or Duck's Arse, a haircut style that was popular during the 1950s
- SJ Da, a Swedish locomotive
- Diploma of Anesthesiology, a degree conferred by some medical institutions such as the Royal College of Anaesthetists
- Da. or Dòna, Occitan for Mrs.
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