AAD may refer to:

Organizations

* ''Ad Altare Dei'', a Boy Scouts of America award *

Advanced Automotive Design {{No footnotes, date=November 2019 Advanced Automotive Design (AAD) is a South African automobile manufacturer located in Die Wilgers, Pretoria. The company was founded in 1995 by Brian Glover and Rhys Edwards. Shaka is a registered Trademark of t ...

, a South African car manufacturer *

Ardent Leisure Ardent Leisure (formerly Macquarie Leisure Trust) is an Australian-based leisure company which owns and operates a leisure portfolio of over 100 assets across Australia, New Zealand and the United States. It is most known for its operation of th ...

, an Australian-based leisure company * AAD Education, Health and Sports (formerly, Athletes Against Drugs), an organization founded by Stedman Graham *

American Academy of Dermatology The American Academy of Dermatology (AAD) is a non-profit professional organization of dermatologists in the United States and Canada, based in Rosemont, Illinois, near Chicago. It was founded in 1938 and has more than 20,500 members. The Academ ...

Australian Antarctic Division The Australian Antarctic Division (AAD) is a division of the Department of Climate Change, Energy, the Environment and Water. The Division undertakes science programs and research projects to contribute to an understanding of Antarctica and the ...

, 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 In mathematics and statistics, deviation is a measure of difference between the observed value of a variable and some other value, often that variable's mean. The sign of the deviation reports the direction of that difference (the deviation is posi ...

and a way to report error against reference data in statistics * Advanced Air defence, an anti-ballistic missile in the Indian Ballistic Missile Defence Programme

Aviation

* Automatic activation device, a fail-safe device often used in a parachute pack *

Adado Airport Adado Airport , also known as Cadaado Airport ( so, Gegada Diyaaradaha Cadaado), is an airport serving the town of Adado in Adado District, Somalia. Airlines and destinations See also * * * List of airports in Somalia This is a list of airp ...

, airport serving Adado, Somalia (IATA code: AAD)

Computing

* aad, or "ASCII Adjust before Division", an

Intel BCD opcode The Intel BCD opcodes are a set of six x86 instructions that operate with binary-coded decimal numbers. The radix used for the representation of numbers in the x86 processors is 2. This is called a binary numeral system. However, the x86 proce ...

* AAD, the

SPARS code The SPARS code is a three-position alphabetic classification system developed in the early 1980s by the Society of Professional Audio Recording Services (SPARS) for commercial compact disc releases to denote aspects of the sound recording and re ...

for a CD that was recorded analog, mixed analog, and transferred digitally * Additional Authenticated Data passed to an "Authenticated Encryption with Associated Data" (

AEAD Authenticated Encryption (AE) and Authenticated Encryption with Associated Data (AEAD) are forms of encryption which simultaneously assure the confidentiality and authenticity of data. Programming interface A typical programming interface for ...

) block cipher mode of operation * Microsoft Azure active directory

Medicine

Antibiotic-associated diarrhea Antibiotic-associated diarrhea (AAD) results from an imbalance in the colonic microbiota caused by antibiotics. Microbiotal alteration changes carbohydrate metabolism with decreased short-chain fatty acid absorption and an osmotic diarrhea as ...

7-Aminoactinomycin D 7-Aminoactinomycin D (7-AAD) is a fluorescent chemical compound with a strong affinity for DNA. It is used as a fluorescent marker for DNA in fluorescence microscopy and flow cytometry. It intercalates in double-stranded DNA, with a high affi ...

(7-AAD), a fluorescent stain for DNA * Acute aortic dissection, a type of

Aortic dissection Aortic dissection (AD) occurs when an injury to the innermost layer of the aorta allows blood to flow between the layers of the aortic wall, forcing the layers apart. In most cases, this is associated with a sudden onset of severe chest or ...

* Antiarrhythmic drug, another name for

antiarrhythmic agent Antiarrhythmic agents, also known as cardiac dysrhythmia medications, are a group of pharmaceuticals that are used to suppress abnormally fast rhythms ( tachycardias), such as atrial fibrillation, supraventricular tachycardia and ventricular ta ...

Other uses

Amal language Amal is a language spoken along the border of Sandaun Province and East Sepik Province, Papua New Guinea, along the Wagana River near the confluence with Wanibe Creek. Foley (2018) classifies Amal as a primary branch of the Sepik languages, tho ...

, a language of Papua New Guinea *

Attitude-toward-the-ad models Attitude toward the ad is defined as "a predisposition to respond in a favorable or unfavorable manner to a particular advertising stimulus during a particular exposure occasion."Lutz. R. J. (1985). Affective and cognitive antecedents of attitude ...

in marketing is a way of measuring the success of an advertisement *

Africa Aerospace and Defence The African Aerospace and Defence Expo (AAD) is an aerospace and defence exhibition held every two years at AFB Waterkloof, in Centurion, Gauteng, South Africa. The exhibition combines a trade exhibition and an air show. The AAD began in 1975 wh ...

, an annual trade show in South Africa