| AAD | American Academy of Dermatology |
|---|---|
| AAD | Atomic Absorption Detector |
| AAS | Atomic Absorption Spectrophotometry |
| ABL | Address Block Locator |
| ABL | Army Battle Laboratory |
| ACS | Air Campaign Simulator |
| ADE | Apple Distinguished Educator |
| ADL | Air Defense Laboratory |
| ADL | Area Dental Laboratory |
| AEA | Atomic Energy Authority (skr.) |