| AAD | American Academy of Dermatology |
|---|---|
| AAD | Automatic Activation Device |
| AAE | automatic answering equipment (skr.) |
| AAF | Audit Automation Facilities |
| ABBE | nemecký fyzik, astronóm a sociálny reformátor (Ernst, 1840-1905) |
| ABDUH | egyptský reformátor |
| ABE | Automated Buyer Environment |
| ABM | Automatic Building Machine |
| ABS | Automated Billing System |
| ABS | Automatic Backup System |