Computer Basics


In the 21st century, technology is an integral part of everyday life. In today's era, no one can think of living without digital resources. In such an environment it becomes imperative for us to be equipped with skills in this field as much as possible.


we have had an introduction to the computer system in the previous article. Now we will discuss the basic functions and devices of the computer system.

Computer System

A Computer system is an electronic device that accepts human instructions(commands) as input, process and displays the desired data as output when needed.

As we discussed in the previous article, the main job of a computer is to follow our instructions, access data and information, process it, analyze it and store it and give an accurate result whenever we need it.

Types of Computer System

Computers may be classified in many ways according to their performance, structure functionality and subsequent features such as an analogue, digital, and hybrid computers. 
Computers may be divided by size, form-factor also. such as Supercomputer, Mainframe computers and servers.
Desktops, laptops, PCs and tablet computers are commonly used in offices, schools, companies and other private and public places.

Part of Computer a computer system

A computer system has two main parts


Hardware is a physical part of a computer that can be felt, touched, and visualized. Such as:
  •     Input Devices
  •     Output Devices
  •     Storage devices
  •     Processing Devices

        Input devices

Devices through which data and instructions are entered into a computer, for multitasking. There are many examples of input devices, some of which are the following.:
  •  Keyboard
  •  Mouse
  •  Joystick     
  •  Scanner  
  •  Light pen
  •  Barcode reader 
  •  Webcam 
  •  Touch screen           

    Output Devices

When data is processed, the output device is used to display the output result of the processed data. The following are examples
  •  Monitor
  • Printer
  • Projector
  • Headphones 
  • Plotter
  • Speakers

    Storage Devices

storage devices are used to store the data and information into the computer after being processed. some of the following examples are given below:
  •   Hard Disk
  •   Pen drive
  •   CD
  •   DVD
  •   Blue-ray Disc

    Processing Devices

Processing devices basically operate in an intermediate stage to process the input data and then send it to the storage device or output device.
Some of the following examples of processing devices are as follows:
  • CPU 
  • UPS
     Video card, Sound card, Network card and Motherboards are also the example of the processing device.


Software may be classified in three types.
    System Software
    Application software
    Programming software

To be continued...