| Abbreviation | Definition |
|---|---|
| ATWE | Abel Tasman Wilsons Experiences |
| AU | Aero Union Corporation |
| AUBA | American Utility Bill Auditors |
| AUBA | Automoveis Batatais, LTDA. |
| AUBC | American-Ukrainian Business Center |
| AUBF | ASEAN-UK Business Forum |
| AUBS | Australian Universal Building Supplies |
| AUC | Associated Underground Contractors |
| AUDI | Auto Union Deutschland Ingolstadt |
| AUFL | Ajanta universal Fabrics Ltd |
| AUGI | Autodesk User Group International |
| AUI | Associated Universities Inc |
| AUL | Agency Underwriting Limited |
| AUL | American Underwater Lighting, Incorporated |
| AUL | American United Life Insurance Company |
| AUL | Arctic Umiaq Line, Greenland |
| AUOL | Australia Online |
| AUS | Advanced Underwriting Service |
| AUS | Allied Universal Services |
| AUSC | Advanced Utility Systems Corporation |