This vector stencils library contains 10 SysML symbols.
Use it to design your use case diagrams using ConceptDraw PRO diagramming and vector drawing software.
"A use case diagram at its simplest is a representation of a user's interaction with the system that shows the relationship between the user and the different use cases in which the user is involved. A use case diagram can identify the different types of users of a system and the different use cases and will often be accompanied by other types of diagrams as well." [Use case diagram. Wikipedia]
The vector stencils library "Use case diagram" is included in the SysML solution from the Software Development area of ConceptDraw Solution Park.