DAA or Daa may refer to:
People Ludvig Kristensen Daa, Norwegian historian, ethnologist, auditor, editor of magazines and newspapers, educator and politician Yinduu Daa, also known as Daai Chin, ethnic tribe of Myanmar Claus Daa, a Danish nobleman and landowner
Technology Data access arrangement, in telecommunications Designated Approving Authority, in the US Department of Defense, an individual who provides oversight of an IT environment Detect and Avoid, a set of technologies designed to avoid interference of UWB upon other networks Direct Access Archive, a file format for disk images
Authentication Data Authentication Algorithm, a former American standard for authentication codes Digest access authentication, protocol for negotiating browser user credentials Direct anonymous attestation, remote authentication of a trusted computer
Other Daa, a ward in the Arusha Region of Tanzania Danmarks Adels Aarbog, (Yearbook of the Danish Nobility), a genealogical publication Davison Army Airfield, Virginia, United States, a military airport Decare, a metric area unit equivalent to 1000 square metres Designers Against Aids, a non-profit organization which battles against AIDS, together with artists, designers and companies Diacetone alcohol, a chemical used as an intermediate and solvent Dictionary of Australian Artists Dubai American Academy, an educational institute located in Dubai, United Arab Emirates DAA (company), an Irish company that operates Dublin Airport and Cork Airport D-aspartic acid