Computer Systems Diagram – Diagram of Components of Computer

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Computer Systems Diagram: What is a Computer System Unit? In this article , we will learn computer system block diagram and all the components of a computer

A computer system unit is a block that contains the main components of a computer. It is also refereed to as a case or tower.

Computer Systems Diagram Definition.

Any desktop computer has a computer unit system unit; a keyboard, a mouse, and a monitor. A computer system is the enclosure of all the other main interior components of a computer. A computer system has the computer chase, computer chassis, or the computer tower.

The computer case are made of either steel or aluminum but also plastic can also be used. Most cases are made to be dull, metal boxes. Manufacturers nowadays are mindful of designs and color in the 21 century.

Functions of a Computer Systems Diagram

The main function of a computer system is to hold the other components together and guard the other electronic sensitive parts together. A computer system has enough space to accommodate both hardware and software upgrades. It is easy to open up a laptop computer.

Computer Systems Diagram

In most computer systems, the front side of the computer contains the elements that a user mostly interacts with such as, power buttons, disk dives, audio outlets, pair headphones inlets, USB connectors and Internet pods.

The back side has contains all other connections – for power, monitor, keyboard, mouse, Internet connection, and any other peripheral devices.






Floppy Drive

Computer Systems Diagram – Inside the Computer Case

When you open up a computer case, it can be difficult to recognize the components for the first time especially the electronic systems. If you would like to know more about the interior part of a computer, you can sign up for basic electronics systems. In most case, the motherboard is placed vertically which is quite common.

The other side of the motherboard is accessible from the other side of the computer case. These include various connectors for input and output devices as well as expansion slots.

The motherboard contains the Central Processing Unit (CPU) which can be hard to see. A fan is often placed to prevent the CPU from overheating. The motherboard also contains the main memory of a computer.

In these article we have covered:

Computer Systems Diagram

Functions of a Computer Systems Diagram
Inside the computer case

Explain Block Diagram Computer


The functions of the input system is to;

  • Take the data to be processed by the user.
  • Convert the given data into machine-readable form.
  • The sole purpose is to connect the user and the computer. In addition, this creates easy communication between them.

CPU(Control Processing Unit)

Central Processing Unit or the CPU, is the brain of the computer. It works the same way a human brain works. As the brain controls all human activities, the CPU too controls all tasks.

ALU(Arithmetic Logic Unit)

The main function of the ALU is to;

  • Performs the basic arithmetical operation on it.

Control Unit

The control unit as the name suggests is the controller of all the activities/tasks and operations. All this is performed inside the computer.

Memory Unit

There are two Memory units ;

  1. Primary Memory
  2. Secondary Memory


All the information sent to the computer once processed is received by the user through the output unit. Devices like printers, monitors, projector, etc. all come under the output unit.

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