Other
- Department of Alaska
- Disciples of Apocalypse, a biker-themed professional wrestling stable
- Department of Agriculture
- Department of the Army
- Drugs of abuse, a DOA panel test is a test performed for the qualitative determination of drug substances in humans
- Double Action Only, a type of firing mechanism found in firearms.
- Date of Arrival
- Dragons of Atlantis; a game popular in Google+, Facebook and many other sites.
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