- DIU stands for Diamond Is Unbreakable (Jojo’s Bizarre Adventure)
- DIU stands for Dhaka International University (Bangladesh)
- DIU stands for Dispositif Intra-Utérin (French: Intrauterine Device)
- DIU stands for Diplôme Inter-Universitaire (French: University Degree)
- DIU stands for Dispositivo Intrauterino (Spanish: Intra-Uterine Device)
- DIU stands for Dossier d’Intervention Ultérieure (French: Record of Further Intervention; Belgium)
- DIU stands for Digital Interface Unit
- DIU stands for Data Interface Unit
- DIU stands for Detroit Industrial Underground (Internet radio station; Detroit, MI)
- DIU stands for Data Information Unit (WOCE)
- DIU stands for Display Interface Unit
- DIU stands for Danmarks Ishockey Union (governing body of Danish ice hockey)
- DIU stands for Death in Utero (aka Intrauterine Death)
- DIU stands for Digital Indoor Unit
- DIU stands for Digital Input Unit
- DIU stands for Data Insertion Unit
- DIU stands for Diagnostic Interface Unit
- DIU stands for Diversification Implementation Unit
- DIU stands for Due-In-Update
- DIU stands for Dedicated Interface Unit
- DIU stands for Digital Interworking Unit
- DIU stands for District Investigative Unit (US DOJ)
DIU