AAD
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AAD may refer to:
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Organizations
- Ad Altare Dei, a Boy Scouts of America award
- Advanced Automotive Design, a South African car manufacturer
- Ardent Leisure, an Australian-based leisure company
- AAD Education, Health and Sports (formerly, Athletes Against Drugs), an organization founded by Stedman Graham
- American Academy of Dermatology
- Australian Antarctic Division, which manages Australia's four Antarctic/sub-Antarctic stations, as well as Heard Island
Science and technology
- Average absolute deviation, a measure of absolute deviation and a way to report error against reference data in statistics
Aviation
- Advanced Air defence, an anti-ballistic missile in the Indian Ballistic Missile Defence Programme
- Africa Aerospace and Defence Expo, a biennial trade show in South Africa
- Automatic activation device, a fail-safe device often used in a parachute pack
- IATA airport code for Adado Airport in Galguduud Region, Somalia
Computing
- aad, or "ASCII Adjust before Division", one of the Intel BCD opcodes
- AAD, the SPARS code for a CD that was recorded analog, mixed analog, and transferred digitally
- Additional authenticated data passed to an "Authenticated Encryption with Associated Data" (AEAD) block cipher mode of operation
- Microsoft Azure active directory
Medicine
- Antibiotic-associated diarrhea
- 7-Aminoactinomycin D (7-AAD), a fluorescent stain for DNA
- Acute aortic dissection, a type of Aortic dissection
- Antiarrhythmic drug, another name for antiarrhythmic agent
Other uses
- Amal language, a language of Papua New Guinea
- Attitude-toward-the-ad models in marketing is a way of measuring the success of an advertisement