A CPU hierarchy chart like this is an example. This template's format is similar to that of a pyramid chart, as you can see from the numerous divisions used to illustrate the hierarchy and size of each system component. The CPU registers are found at the top, while the temporary memory area, which includes cache and RAM, is found below. Following that comes secondary storage, such as hard disk and ROM. At first glance, the chart makes the internal CPU structure more understandable.