| Abbreviation | Definition |
|---|---|
| ASSSC | Australian System Safety Society Chapter |
| ASSSI | Australian Society of Soil Science Incorporated |
| ASTA | Australian School of The Arts |
| ASTA | Australian Science Teachers Association |
| ASTAG | Australian Strategic and Technical Advisory Group |
| ASTLA | Australian Short Term Lenders Association |
| ASTN | Australian Sports Tech Network |
| ASTN | Australian Stroke Trials Network |
| ASTRA | Australian Subscription Television and Radio Association |
| ASTW | Australian Society Of Travel Writers |
| ASUD | Australian Stratigraphic Units Database |
| ASVB | Australian Social Value Bank |
| ASVS | Australian Security Vetting Service |
| ASVS | Australian Specialised Vehicle Systems |
| ASVS | Australian Standard Vaccination Schedule |
| ASWG | Australian Special Wireless Group |
| ASX | Australian Stock Exchange |
| ATAA | Australian Technical Analysts Association |
| ATAAC | Australian Teens Against Animal Cruelty |
| ATAGI | Australian Technical Advisory Group on Immunisation |