| AAB | American Association for Bronchology |
|---|---|
| AAB | Anderson Anderson and Brown |
| AAB | Association of Aircraft Brokers, Združenie sprostredkovateľov v leteckej doprave (angl.skr.) |
| ABA | Australian Broadcasting Authority |
| ABC | American Broadcasting Company, americká rozhlasová a televízna spoločnosť, televízna stanica v USA |
| ABC | Australian Broadcasting Commission |
| ABN | African Broadcasting Network |
| ABN | Alarm Broadband Network |
| ABS | Army Broadcasting Service |
| ACTS | Abroll-Container-Transport-System, systém kombinovanej dopravy v oblasti železnica-cesta |