the main part of a computer system is called central processing unit or also known as CPU
The cpu
operating system
The CPU is considered the "brain" of the computer, and since the brain is part of our nervous systems, this would be your answer.
CPU is main part of computer,or it is brain of computer,CPU is the most important element of a computer system. The CPU also know as, Processor, central processor,microprocessor,it is a brain of computer.
It's called a Processor. Its computes , or processes information in the computer.
A system unit is the main part processing unit and devises of a micro computer. A system unit includs a board called a mother board that holds a micro processor ship .The system unit is housed within the system cabinet
ROM
A system of wires called the bus. Signals are sent through these wires from one component of the system, such as the CPU, to another part, say, the hard drive.
It is often incorrectly called the CPU or processor. Some call it the "brains" of the computer. These days, the "system unit" is the main part of the computer, the "box" part of it. To be more specific, "motherboard" may be the term you are looking for, and it is the main part of the computer located inside the case.
A tower system is a computer that uses a tower as its main part. The towers are usually two feet tall and half a foot wide.
The main part of the periphal nerve system
the three main part are solar system and digestive system and excretory system