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