AAD

AAD is a three-letter abbreviation with multiple meanings, as described below:

• Ad-Dabbah Airport (IATA airport code: AAD) in Ad-Dabbah, Sudan
• American Academy of Dermatology
• ASCII Adjust before Division, an Intel 80x86 processor instruction
• Associação de Activismo para a Democracia, a political party in Macau
• Australian Antarctic Division, which manages Australia's four Antarctic/sub-Antarctic stations, as well as Heard Island
• Automatic activation device, a "fail-safe" device often used in a parachute pack to automatically deploy the reserve parachute at a preset altitude
• Analog, analog, digital, a three-letter code for a CD that was recorded analog, mixed analog, and transferred digitally.