This article delves into a specific queueing method known as the circular queue. This has some first in first out (FIFO) principles in place but is adapted to better attend to a different situation. A circular queue is a FIFO queue that plans out what happens when there is no more space in the queue in question for a different customer or person to join the queue. This means that the queue itself is servicing and moving positions along. It is difficult to explain but the article goes into much more detail. Use it to better grasp the concept of a circular queue and to picture the idea that a subtle change to a regular FIFO queue can make it much better or worse for a specific situation.