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The Computer Hardware Parts Explained

Updated on August 18, 2016

Computer Hardware Parts

In this hub, computer hardware parts explained, we are going to have a look at some of the hardware parts that make up a computer.

A computer also known as a PC, is a very useful electronic devices that we use in modern world. The term PC is an acronym for Personal Computer, a computer designed to be used by one person at a time. The first personal computer was invented by IBM back in 1981.

The Main Computer Parts

The computer is made up of two main parts, hardware and software. The hardware is the physical parts that make up your computer. The parts that we can see and touch for example monitor, keyboard, mouse, processor among others.

Software/programs:- These are written instructions that tell your computer what to do. In other words these written instructions tell the Microprocessor how to function or operate.

Hardware:- The physical components that make up a computer are called hardware parts and can be classified according to their functionality. Some of the components are used for input (entering data), processing, storage and others for output purposes. Therefore you can define a computer as an electronic device that can accept data, process the data, store, and produce an output.

Main Computer Hardware Parts

A computer
A computer | Source

Diagram Showing How Computer Executes Commands

This diagram, illustrates how a computer executes a command. The input device receives the instructions that are then passed to the processor, which does the processing to determine what the command is supposed to do; and communicates the results of the processing through the output devices or stores them for future use.

Diagram Showing Computer Hardware Parts

A Block Diagram of a Computer
A Block Diagram of a Computer | Source

Computer Hardware Parts Explained

Whenever you are to use your desktop PC, you will encounter the following basic hardware parts.

Input Devices

Input devices are used to enter raw data into a computer. They offer an interface (link) between the user and the computer.

The Keyboard

Various keys on the keyboard let you enter information into a computer. Computer keyboards are similar to electric-typewriter keyboards but contain additional keys. The keys on computer keyboards are often classified as follows:

  1. Alphanumeric keys:- These are the letters and number keys.
  2. Punctuation keys:- comma, period, semicolon e.t.c.
  3. Special keys:- function keys, control keys, arrow keys, Caps Lock key e.t.c.

The standard layout of letters, numbers, and punctuation is known as a QWERTY keyboard because the first six keys on the top row of letters spell QWERTY.

Computer Keyboard

Computer Keyboard
Computer Keyboard | Source

The Computer Mouse

A mouse is a hand-held device that helps you select and move items on your screen. A mouse can come in various shapes, colors and sizes.

Computer Mouse

Computer Mouse
Computer Mouse | Source


A scanner is a device that reads graphics and text from printed documents and feeds them into a computer.

Flatbed Scanner

A Scanner
A Scanner | Source


A joystick helps you control the movement of people and objects in many games. Joysticks are used for arcade-type computer games because they let you move quickly and accurately in any direction.

Other input devices include: Touch screens, digital cameras, bar code readers, and microphones for voice input among others.

The Processing Device

The processor or the Central Processing Unit (CPU) is the main chip in a computer. It performs arithmetic & logical operations. The processor manipulates raw data and manages how the information flows through a computer system. It communicates with input, output and storage devices to perform tasks. It also controls the operation of other components in the system.

A Computer Processor

Intel Computer Processor
Intel Computer Processor | Source

Storage Devices (Hard Disk Drive)

The hard disk holds information permanently until it is needed, after one day, one year or for any period of time. The information could be filing names and addresses in a database, pictures etc. There is no point of processing or storing information unless it can be accessed again in the future.

The hard disk drive is contained within the system unit though nowadays, external hard disk drives are readily available. They make their connection to the computer using the USB interface. The removable hard disk drives are very good for storing our data backups.

Hard Disk Drive

Hard Disk Drive
Hard Disk Drive | Source

Output Devices

Out put devices give us an output of what has been processed - information in, information out. This could be the printing of mailing labels from the database or displaying the picture on a web page. They include: -

A monitor displays text and images after being processed in soft copy.

A TFT Monitor

A TFT Monitor
A TFT Monitor | Source


A printer produces a paper copy (hard copy) of the information displayed on the screen.


A Printer
A Printer | Source


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    • profile image

      kp sapkota 13 months ago

      Nice job

    • Patkay profile image

      Patrick Kamau 3 years ago from Nairobi, Kenya

      Thanks TTGReviews, glad you visited.

    • TTGReviews profile image

      TTGReviews 3 years ago

      Nice information

    • Patkay profile image

      Patrick Kamau 5 years ago from Nairobi, Kenya

      danish chohan, Yes, there are some more tutorials i have prepared that are very useful. One that can help you is "Parts of Motherboard and their Functions" as it discuses the internal components of the computer system. I am sure this will help you achieve what you want.

    • profile image

      danish chohan 5 years ago

      hey can u plz tell me only internal and basic structure of system unit with their diagrams or and specific website for this purpose

    • Patkay profile image

      Patrick Kamau 5 years ago from Nairobi, Kenya

      dianne, thanks for reading and commenting. I am glad you got some help from this tutorial. Keep reading and you will get more valuable knowledge.

    • profile image

      dianne 5 years ago

      nice article thanks for helping me on my assignment

    • Patkay profile image

      Patrick Kamau 5 years ago from Nairobi, Kenya

      You are welcome venkat. Glad you liked it.

    • profile image

      venkat 5 years ago

      thank u

    • Patkay profile image

      Patrick Kamau 5 years ago from Nairobi, Kenya

      francis coppee, thanks and you are welcome to check more of my work.

    • profile image

      francis coppee 5 years ago

      thanks very much to give those notes it is understandable!!!!!!!!!!!!!!!

    • Patkay profile image

      Patrick Kamau 5 years ago from Nairobi, Kenya

      Thanks advaneil for reading and commenting.

    • profile image

      advaneil 5 years ago

      I have really enjoyed reading your posts about computer hardware parts. Thanks for all you do and share.


    • Patkay profile image

      Patrick Kamau 5 years ago from Nairobi, Kenya

      You are welcome hira. Keep reading my tutorials. Thanks for stopping by and taking your time to comment.

    • profile image

      hira 5 years ago

      thank you so much...............................................!!!

    • Patkay profile image

      Patrick Kamau 6 years ago from Nairobi, Kenya

      Thanks leewatson07 for popping in.

    • Patkay profile image

      Patrick Kamau 6 years ago from Nairobi, Kenya

      @yettynatty, you are welcome to read more articles of mine. Thanks for the feedback.

    • profile image

      yettynatty 6 years ago

      thank u so much for the article, it was so helpful in my assignment

    • profile image

      yettynatty 6 years ago

      good work

    • Patkay profile image

      Patrick Kamau 6 years ago from Nairobi, Kenya

      @Dean Slama thanks for reading. I will check your site.

    • profile image

      Dean Slama 6 years ago

      Hey, if you're looking for Computer Hardware Parts to upgrade your PC or to build your own computer, check out my Site please.

    • Patkay profile image

      Patrick Kamau 6 years ago from Nairobi, Kenya

      Thank you past for stopping by.

    • profile image

      past 6 years ago

      thank you

    • Patkay profile image

      Patrick Kamau 7 years ago from Nairobi, Kenya

      Thanks Shemn.We have a lot to learn and to give out to others.Let's enjoy & use the technology we have.

    • profile image

      shemn 7 years ago

      credible i ll join you and make sure we proceed 2gether enlightening our colleagues about I.C.T. cool man.

    • Patkay profile image

      Patrick Kamau 7 years ago from Nairobi, Kenya

      Thanks a lot NoRR4Me,what you have said is very true. We have to enlighten people about computers especially here in Africa where we have a lot of "newbies". Thanks for your suggestion. I have gone for it.

    • NoRR4Me profile image

      NoRR4Me 7 years ago

      Welcome to HubPages! This is good 1st hub.

      I think most of us are so used to using computers that we forget that there are still some "newbies" out there who are just now learning about computers and don't have a clue about them. They need to know the basics of computers and your hub explains them. Great idea.

      P.S. You said that you will make improvements. I have 1 suggestion; your title should have the 1st letter of each word capitalized. :-)

    • Patkay profile image

      Patrick Kamau 7 years ago from Nairobi, Kenya

      Thanks kdban for taking time to go through. I intend to improve and make it more better and informative. Actually its my first hub.

    • profile image

      Kdban 7 years ago

      thanks for the helpful article.


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