| Abbreviation | Definition |
|---|---|
| AOCOA | Australian Oil Company Limited |
| AOD | Aurora Sandringham Dividend Income Trust |
| AOH | Altona Mining Limited |
| AOK | Austex Oil Ltd |
| AOM | Australia Oriental Minerals NL |
| AON | Apollo Minerals Ltd |
| AOP | Apollo Life Sciences Ltd |
| APA | Australian Pipeline Trust |
| APAKOP | Apa Group |
| APAKRP | Apa Group |
| APB | Arafura Pearls Holdings, LTD. |
| APBO | Arafura Pearls Holdings Limited |
| APD | APN Property Group Ltd |
| APE | AP Eagers Holdings Ltd |
| APG | Austpac Gold Resources NL |
| API | Australian Pharmaceutical Ind Ltd |
| APK | Australian Power & Gas Company Ltd |
| APN | APN News & Media Ltd |
| APP | APA Financial Services, LTD. |
| APZ | Aspen Group |