Computer hardware systems normally have a number of components. Even a
microcomputer cannot do much without the aid of supporting hardware or peripheral
equipment. The main part of the computer, where all the work or manipulation
is carried out, is referred to as the central processing unit (CPU). The
CPU is often referred to as the brain of a hardware system because it controls
all other hardware and peripheral equipment or devices.
The CPU has its own set of instructions built in its memory chips that cannot