| Acronym | Meaning |
| DEU | Data Encryption Unit |
| DEU | Deck/Engine Utility |
| DEU | Delegated Examining Unit (US Government) |
| DEU | Democratic Union (Czech Republic) |
| DEU | Display Electronic Unit |
| DEU | Display Electronics Unit |
| DEU | Distinctive Environmental Uniform |
| DEU | Drug Enforcement Unit |
| DEU | Germany (ISO Country code) |