| Acronym | Definition |
|---|
| ADU | Abu Dhabi University (United Arab Emirates) |
| ADU | Accessory Dwelling Unit (separate living space) |
| ADU | Adamson University (Manila, Philippines) |
| ADU | Application Data Unit |
| ADU | Ammonium Diuranate |
| ADU | Advanced Display Unit |
| ADU | Aironet Desktop Utility |
| ADU | Anesthesia Delivery Unit (various locations) |
| ADU | Animal Demography Unit (University of Cape Town; South Africa) |
| ADU | Affordable Dwelling Unit (various locations) |
| ADU | Aironet Desktop Utility (Cisco) |
| ADU | Air Defense Unit |
| ADU | Automatic Dialing Unit |
| ADU | Array Diagnostic Utility (Compaq) |
| ADU | Air Data Unit |
| ADU | Adapter Unit |
| ADU | Average Daily Usage |
| ADU | Aircraft Delivery Unit |
| ADU | Agence de Développement et d'Urbanisme (French: Development and Planning Agency) |
| ADU | Analog-to-Digital Unit |
| ADU | Automatic Duplexing Unit |
| ADU | Active Duty Unit |
| ADU | Anti-Doping Unit (International Handball Federation) |
| ADU | Asynchronous Data Unit |
| ADU | Afghan Disabled Union (Taimani Kabul, Afghanistan) |
| ADU | Application Definition Utility |
| ADU | Azimuth Display Unit |
| ADU | Audience Deficiency Unit (advertising) |
| ADU | Appliance Distributors Unlimited, Inc. (est. 1982) |
| ADU | Auxiliary Display Unit |
| ADU | Antenna Drive Unit |
| ADU | Audio Distribution Unit |
| ADU | Acción Democrática Universitaria (Democratic University Action-Collegiate movement, Guatemala) |
| ADU | ARTS Data Unit HWCI |
| ADU | Article Dashboard University |
| ADU | Angels Dance Upward |
| ADU | Accumulation & Distribution Unit |
| ADU | Activity Driver Unit |