https://image.slidesharecdn.com/employeemanagementsystemumldiagrams-150626010956-lva1-app6892/95/employee-management-system-uml-diagrams-use-case-diagram-activity-diagram-state-chart-diagram-or-state-machine-sequence-diagram-class-diagram-deployment-diagram-component-diagram-and-text-10-638.jpg?cb=1444701083