AAD
AAD is a three-letter abbreviation with multiple meanings, as described below:
- 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.
- AAD IATA Airport Code: