![Use Case Diagram, UML Diagrams Example: Business Use Case Diagram Example - Visual Paradigm Community Circle Use Case Diagram, UML Diagrams Example: Business Use Case Diagram Example - Visual Paradigm Community Circle](https://circle.visual-paradigm.com/wp-content/uploads/2017/08/Use-Case-Diagram-Business-Use-Case-Diagram-Example-1-1280x720.png)
Use Case Diagram, UML Diagrams Example: Business Use Case Diagram Example - Visual Paradigm Community Circle
![Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors). Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors).](https://www.uml-diagrams.org/use-case-diagrams/use-case-diagram-elements.png)
Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors).
![UML use case diagram examples for online shopping of web customer actor with top level use cases View Items, Make Purchase and Client Register, other use cases are Customer Authentication, View Recommended UML use case diagram examples for online shopping of web customer actor with top level use cases View Items, Make Purchase and Client Register, other use cases are Customer Authentication, View Recommended](https://www.uml-diagrams.org/examples/use-case-example-online-shopping.png)