| ACU | Abilene Christian University 
| Others |
| ACU | Access Control Unit
| Others |
| ACU | Acoustic Sensor
| Others |
| ACU | Acquisition Control Unit
| Others |
| ACU | Acute Care Unit
| Others |
| ACU | Address Calculation Unit
| Others |
| ACU | Address Control Unit
| Others |
| ACU | Adobe Connect Update
| Others |
| ACU | Advanced Control Unit
| Others |
| ACU | Advisory Committee on Uranium
| Others |
| ACU | African Christian University
| Others |
| ACU | Agrupacion Catolica Universitaria
| Others |
| ACU | Air Compressor Unit
| Others |
| ACU | Air Conditioning Unit
| Others |
| ACU | Air Control Unit
| Others |
| ACU | Air Cooling Unit
| Others |
| ACU | Airbag Control Unit
| Others |
| ACU | Airman Combat Uniform
| Others |
| ACU | Aironet Client Utility
| Others |
| ACU | Ajayi Crowther University, Ibadan
| Others |
| ACU | Alabama Credit Union
| Others |
| ACU | Alarm Control Unit
| Others |
| ACU | All Completely Useless
| Others |
| ACU | Allco Credit Union
| Others |
| ACU | Allegiance Credit Union
| Others |
| ACU | Alliance Credit Union
| Others |
| ACU | Ambulatory Care Unit
| Others |
| ACU | America's Credit Union
| Others |
| ACU | American Conservative Union
| Others |
| ACU | American Cuck Union
| Others |
| ACU | Animal Care and Use
| Others |
| ACU | Annihilation Cell Units
| Others |
| ACU | Antenna control unit
| Others |
| ACU | Anti Corruption Unit
| Others |
| ACU | Anti-Corruption Unit
| Others |
| ACU | Arctic Command Unit
| Others |
| ACU | Area Command Unit
| Others |
| ACU | Area Common User
| Others |
| ACU | Arithmetic and Control Unit
| Others |
| ACU | Arizona Christian University
| Others |
| ACU | Arm Computer Unit
| Others |
| ACU | Arm Control Unit
| Others |
| ACU | Armor Command Unit
| Others |
| ACU | Armored Command Units
| Others |
| ACU | Army Comabt Uniform
| Others |
| ACU | Army Combat Uniform
| Others |
| ACU | Array Configuration Utility
| Others |
| ACU | Arrowhead Credit Union
| Others |
| ACU | Asian Clearing Union
| Others |
| ACU | Asian Clearing Unit
| Others |
| ACU | Asian Cultural Union
| Others |
| ACU | Asian Currency Union
| Organization |
| ACU | Asian Currency Unit
| Others |
| ACU | Assault Craft Unit
| Others |
| ACU | Asset Containment Unit
| Others |
| ACU | Associated Credit Union
| Others |
| ACU | Association of Clinicians for the Underserved
| Others |
| ACU | Association of Commonwealth Universites
| Others |
| ACU | Association of Commonwealth Universities
| Others |
| ACU | Atheros Client Utility
| Others |
| ACU | Atmospheric Control Unit
| Others |
| ACU | Attitude Control Unit
| Others |
| ACU | Audio Control Unit
| Others |
| ACU | Australian Catholic University
| Others |
| ACU | Auto Centrale Utrecht
| Others |
| ACU | Auto Crime Unit
| Others |
| ACU | Auto Cycle Union
| Others |
| ACU | Autodesk Certified User
| Others |
| ACU | Automatic Call Unit
| Others |
| ACU | Automatic Calling Unit
| Others |
| ACU | Automatic Client Update
| Others |
| ACU | Automatic Client Upgrade
| Others |
| ACU | Automotive Communications Unit
| Others |
| ACU | Automovil Club del Uruguay
| Others |
| ACU | Autopilot Control Unit
| Others |
| ACU | Auxiliary Control Unit
| Others |
| ACU | Avast Cleanup
| Others |
| ACU | Azure Compute Unit
| Others |
| ACU | Azure Compute Units
| Others |
| ACU | Credit Union
| Others |