Figure 8 State diagram for task management.

The reason for including the last item in the list above is that the task descriptors are usually held in a linked list structure. The executive keeps a set o f lists, one for each task state as shown in Figure 9. There is one active task (task I D = 10) and three tasks that are ready to run IDs = 20, 9, and 6. The entry held in the executive for the ready queue head points to task 20, which in turn points to task 9 and so on.