| Abbreviation | Definition |
|---|---|
| ATTT | Australia Trauma Team Training |
| ATTT | Australian Trauma Team Training |
| ATWD | Australian Teacher Workforce Data |
| ATWS | Australian Tsunami Warning System |
| ATWU | Australian Textile Workers' Union |
| ATWU | Australian Timber Workers Union |
| AU | A Australia |
| AUA | Assets Under Administration |
| AUA | Australian Urology Associates |
| AUCA | Australia Unique Collection Accessories |
| AUD | Australian Dollar's |
| AUF | Australian Underwater Federation |
| AUKUS | Australia, United Kingdom, United States |
| AUKUS | United Kingdom, United State and Australia Known as AUKUS |
| AUP | Australia |
| AUP | Australian Underwater Products |
| AUPN | Australian Universities Procurement Network |
| AUPN | Australian University Procurement Network |
| AUS | Australia |
| AUS | Australian University Sport |