UDU
| Acronym | Definition |
|---|---|
| UDU | Uma Data Unit |
| UDU | Unione Degli Universitari (Italian: Union of Universities; various locations) |
| UDU | Unionist Democratic Union (Tunisia) |
| UDU | Underwater Demolition Unit |
| UDU | Union Deutscher Unternehmensberater (German: Union of German Management Consultants) |
| UDU | Uniformity of Dosage Units |
| UDU | Upper Deck Uniforms (sports cards) |