Here is a detailed activity diagram for the employment system in a company. From this system, you can add new employees, chat with other employees, or view the profiles of employees. Activity Diagrams, along with Use Case, State Machine, and Interaction Diagrams, are behavior diagrams in UML (Unified Modeling Language). They model what actions and workflows happen in a particular system or piece of software. Learn more details from this diagram, or try to make yours with ease.