| Acronym | Definition |
|---|
| UML | Unified Modeling Language (Object Management Group, OMG) |
| UML | University of Massachusetts Lowell |
| UML | User Mode Linux |
| UML | Universal Modeling Language |
| UML | Unified Modeling Language |
| UML | Unified Marxist Leninist |
| UML | Upper Mixed Layer (oceanography) |
| UML | Usha Martin Limited (est. 1961; Jharkhand, India) |
| UML | Universal Markup Language (common, but incorrect) |
| UML | University Map Library (University of Waterloo; Canada) |
| UML | Unconditional Maximum Likelihood |
| UML | Universal Mission Load |
| UML | Uncorrelated Missile Launch |
| UML | United Microwave Laboratory (Saint Petersburg, Russia) |