| Acronym | Definition |
|---|
| ACN | Accenture |
| ACN | Accenture (stock symbol) |
| ACN | Australian Company Number |
| ACN | Automatic Collision Notification (US DOT) |
| ACN | Acetonitrile |
| ACN | Aid to the Church in Need (Catholic charity) |
| ACN | African Cup of Nations (sporting event) |
| ACN | Anglican Communion Network |
| ACN | Area Code Number |
| ACN | Automatic Crash Notification (GM OnStar) |
| ACN | Ascension Island (STDN Station) |
| ACN | Association for Comprehensive NeuroTherapy |
| ACN | Aircraft Classification Number |
| ACN | Adventist Communication Network |
| ACN | Air Cargo Netherlands |
| ACN | Association of Camp Nurses |
| ACN | Andean Community of Nations |
| ACN | Australian Cancer Network |
| ACN | American Comedy Network |
| ACN | Advanced Control Network (entertainment lighting) |
| ACN | Airborne Communications Node |
| ACN | Anti-Corruption Network for Transition Economies (Organisation for Economic Co-operation and Development) |
| ACN | American Community Newspapers, Inc. (Addison, TX; also seen as ACNI) |
| ACN | Ante Christum Natum (Latin: Before the Birth of Christ) |
| ACN | Advance Change Notice |
| ACN | Apple Consultant Network |
| ACN | Association of Consultants to Nonprofits |
| ACN | A. C. Nielsen Company (marketing research) |
| ACN | Audit Control Number (banking) |
| ACN | Asamblea Canaria Nacionalista (Canary Nationalist Party) |
| ACN | Acoustic Neurinoma |
| ACN | Associate Charge Nurse (Victoria, Australia) |
| ACN | America's Collectables Network |
| ACN | Administrative Change Notice |
| ACN | America Coasters Network (roller coasters) |
| ACN | Adaptive C4ISR Node |
| ACN | Assign Commercial Network |
| ACN | Automatic Celestial Navigation |
| ACN | Automatic Change Notification |
| ACN | ATM Core Network |
| ACN | Account Control Number |
| ACN | Agreement Change Notice |
| ACN | Alternate Contact Name |
| ACN | Area Control Network (computer science) |
| ACN | Australia Campus Network |
| ACN | Audiotext Communications Network, Inc. |
| ACN | l'Association Canadienne de Numismatique (Canadian Numismatic Association) |
| ACN | Authorization Change Notice |
| ACN | Action Control Number |
| ACN | Activity/Authorized Control Number |
| ACN | Abbreviated Contract Number |
| ACN | Aircraft Condition Notice (FAA Form 8620-1) |
| ACN | Airborne Communications Network |
| ACN | Assignment Control Number |
| ACN | Assigned Channel Number |
| ACN | Allowance Change Notice |