One of the main functions of the operation system is to schedule processes that the processor executes. One of the very popular algorithms for this scheduling is called Round Robin, where each process enters a queue, executes in a FIFO order, and after a specified time its execution stops and returns back at the end of the queue if it still need time to continue execution or aborts if it has finished its required time of execution.
credits to Seif Tahtawy and Mohamed Alaa