What is a computer system ? Benefits in Modern day

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What is a Computer System or a Personal Computer?

A Personal Computer is an Electronic Computational device which was used for some general simple to complex mathematical calculations.

A modern day personal computer was used for general calculation purpose computer mainly operates with input and output devices which are as follows.


Desktop Computer or Personal Computer [PC]
Desktop Computer

Input devices of computer

  • Keyboard
  • Mouse
  • Scanner
  • Trackball
  • Joystick
  • Light-Pen
  • Touchscreens
  • Optical Card Reader (OCR)
  • Magnetic Ink Character Recognition (MICR)
  • Optical Bar Code Reader (OBR)
  • Voice Recognition Devices
  • Optical Mark Reader (OMR)

These types of input devices specially works with computer internal architecture where some important task has to be done.

Output Devices of computer System

The output devices can be categorized in the following types and Complete list of output Devices are as follows::

  • Monitors
  • Touch Screens
  • LCD Monitors or LED Monitors
  • Printers
  • Speakers
  • Headphones
  • Sound Cards
  • Plotters
  • Projectors
Advantages of computer 
  • Speed
  • Accuracy
  • Stores huge amount of data
  • Online trading
  • Online education | Distance Learning
  • Research
  • Forecasting weather,and predicting earthquakes ,volcano eruptions
  • Produce Employment
  • Internet
  • In Business
Disadvantages of Computer

  • Health Issues.
  • Spread of pornography
  • Virus and hacking attacks
  • Computer can not take their own decision NO IQ
  • Negative effect on Environment
  • Crashed networks
  • Computer can not work on itself
  • Spread of violence,hatred
  • Online Cyber Crimes
  • Data and Information violation

Different Characteristics of Computer

The characteristics of computer system can be defined as the basic and advance features of computer system they have during their evolution.

Computers characteristics has been dramatically changed and improved due there heavy demand and used across the globe .

List of some basic characteristics of computer are as follows

  • Speed
  • Accuracy
  • Memory
  • Diligence
  • Versatility
  • Reliability
  • Low Cost & Reduced Size
  • Automatic
  • No Feeling & No IQ 

Different classifications of Computer

Modern day computer has been classified into three(3) different types they are as follows:


  • Analog Computers
  • Digital Computers
  • Hybrid Computers (Analog+Digital)

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