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