The tool has the buttons previous and next, and every step an animation occurs and a text arises, explaining what has occurred in the context of analogy and in the context of operating systems. Recalling that the analogy is just to make the didactic teaching. Video showing how to use the tool: Application forms: Instructors who teach disciplines of operating systems, when approaching the subject of states of a process, they can use it in class, or just lectures, displaying the use of the tool to students, showing in a more interesting and practical way of how process states concept works as well as multiprogramming, time-sharing and preemption. Instructors may suggest this tool other people in the same area to also use it while introducing the content covered by the OER to their students. Thus, the tool would be released to more students. About students, they can just watch their teachers using the tool, or if they want they can also access the OER through a link. This way they can use the OER by their own devices at home. If they have any trouble in understanding the theme, the use of the resource should facilitate their knowledge in issues addressed by the OER. Source: https://github.com/luanorlandi/REA-Estados-de-um-processo