| Acronym | Definition |
|---|
| DAU | Defense Acquisition University |
| DAU | Daughter |
| DAU | Daily Active User |
| DAU | Document Administratif Unique (French: Single Administrative Document; EU) |
| DAU | Dana Abadi Umat (Indonesian: Ummah Endowment Fund) |
| DAU | Distribution Amplifier Units |
| DAU | Direction de l'Aménagement Urbain (French: Directorate of Urban Planning) |
| DAU | Dümmster Anzunehmender User (German: Dumbest Assumable User; play on words, see GAU) |
| DAU | Data Acquisition Unit |
| DAU | Dana Alokasi Umum (Indonesian: General Fund Allocation) |
| DAU | Data Analysis Unit |
| DAU | Drugs of Abuse Urine (testing) |
| DAU | Daily Average User (gaming statistic) |
| DAU | Documento Amministrativo Unico (Italian: Single Administrative Document, European customs) |
| DAU | Dogu Akdeniz Universitesi (Turkey) |
| DAU | Direction de l'Architecture et de l'Urbanisme (French: Department of Architecture and Urbanism) |
| DAU | Development Assessment Unit |
| DAU | Data Adapter Unit |
| DAU | Damage Assessment Unit |
| DAU | Digital Adapter Unit |
| DAU | Display Adapter Unit |
| DAU | Disk Array Unit |
| DAU | Declaration of Atlantic Unity |
| DAU | DSL Analyzer Unit (Hekimian) |
| DAU | Digital Arithmetic Unit |
| DAU | Design Assurance Unit |
| DAU | Drawn Amount Uncollected (banking) |