| Abbreviation | Definition |
|---|---|
| ACMA | Australian Communications and Media Authority |
| ACMF | Australian Country Music Foundation |
| ACMI | Australian Centre for Moving Image |
| ACMI | Australian Centre For the Moving Image |
| ACMID | Australian Census and Migrants Integrated Dataset |
| ACMM | Australian Centre for Microscopy Microanalysis |
| ACMMI | Australian Collectors of Mechanical Musical Instruments |
| ACMS | Australian Clay Minerals Society |
| ACMS | Australian Computer Museum Society |
| ACMT | Australian Civil and Mining Training |
| ACN | Australian Campus Network |
| ACN | Australian Company Number |
| ACN | Australian Company Numbers |
| ACNB | Australian Commonwealth Naval Board |
| ACNT | Australian Council of National Trusts |
| ACNU | Australian Council for New Urbanism |
| ACO | Australian Chamber Orchestra |
| ACOB | Australian Council Of Businesswomen |
| ACOC | Australian Committee on Cataloguing |
| ACOFS | Australian Council of Film Societies |