in operating system having different queues of processes is shown below: 

Job Queue: Each new process goes into the job queue.Processes in the job queue reside on mass storage and the allocation of main memory is awaited. 

Ready Queue: in main memory the set of all processes that waiting for CPU. time is kept in the ready queue. 

Waiting (Device) Queues: The set of processes waiting for allocation of certain I/O devices is kept in the waiting (device) queue. Device Queue is the list of processes waiting for particular I/O devices.