Categories: Technology

What is computer system and its components in English

These days Everyone wants to know about computers.  Must have seen it in an offices, Railway station or shopping mall.…

These days Everyone wants to know about computers.  Must have seen it in an offices, Railway station or shopping mall. Have you ever thought what is a computer, and how does it work , and who made it?

Because we are all wants to know what is computers , and how it works. In present-times computers is being used everywhere, whether it is in the private sector or a government office.

So let’s know what is a computers ? In this post I will elaborately describe about computers.

The general meaning of Computer is do calculation. Which features is doing calculation. It called computer.

Full form of computers:-


Co: – Common

M: – Multi

P: – Purpose

U: – Unit

Ter: – Terminal

Definition of Computer

A computer is a device that has no fixed definition, although people define it differently.

In other hands, Computers is a electronic device which works a tremendous speed and process raw data and generate require results.

It gives results as per my requirement. This process culminates in three stages: –

Data Input



  • Mouse, keyboard, sketch pen, pen drive, scanner, all these devices are examples of input devices. Computers take input from these data. The computer is then instructed through the software via commands. Which is called entering data.
  • The second step is process data. So according to the command with the help of software, what you give the command the computers processes. There is many arithmetic or logical operations in it.
  • Output is the last and third phase. Result processed by the computers displayed on the screen . After this, you can save it, or take print-out.

It works only with the help of software and hardware. Its brain, which is called CPU, they are connected to all other hardware; they do operation by aligning with it, which is called operating-system.

Parts of the Computers

According to the Input and Output device there are the following parts are the computers:-

Input Devices

  • Keyboard
  • Mouse
  • Scanners Machine
  • Digital Camera
  • Microphone
  • Touch Screen etc.

Output Devices

  • Monitor Screen
  • Printer
  • Speaker
  • Sound Card
  • Video Card etc.

We cover information about the main components of the computers. Because it is made up of many components.

CPU: – Central Processing Unit.

CPU is called processors it is also called a brain of computers, because withou all are in vain.  Therefore it is essential parts. It processes your data, the better the processor will process your data.


It is look like a thin plate. It is in the middle of the Computers CPU. With this slot many small hardware’s connected with, like-CPU, Memory card, hard disk, disk drive, audio-video card, optical drive etc.

RAM-(Random Access Memory)

We can save your valuable data in RAM. Working with Computers sometimes your PC shutdown due to power cut or any other issues, in this occur data loss. But you save your data then you regain.RAM protect your data on hard disk and it is a storage media. RAM is denoted by Megabytes (MB) or Gigabyte (GB) . The higher the GB of RAM is the better speed of your PC.
1 bye = 8 bits
1 KB = 1000 bytes
1 MB = 1000 KB
1 GB = 1000 MB

Hard Disk or Drive

Hard disk is a main storage of Computers. In which you can save important data and keep it for long time. Today’s many external devices available. For Example: – Pen drive, Floppy drive, Zip drive, CD Drive, DVD drives etc.


SMPS is look like as electric transformer. Its main functions are power supply. They power supply to all the components of the computers as per the requirements.


It is also called Visual Display Unit. It is Output device. This is called screen or monitor. Now it is available in many different sizes such as 14″, 21″ and much more. It is look like as a TV, but now LCD and LED are available in the market.

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