What is a CPU?

equipment designed to store large volumes of data for long$-$term storage

the computer's main memory, which consists of the random access memory $($RAM$),$ cache memory, and the read$-$only memory $($ROM$)$ that is directly accessible to the central processin unit $($CPU$)$

equipment used to capture information and commands

$q,$ the actual hardware that interprets and executes the program $($software$)$ instructions and coordinates how all the other hardware devices work together