1. Assignement
Islamia University of
Bahawalpur
Department:
Institute of Business, Management and Administrative Sciences
Subject: Computer application in business
Topic: Input , output devices Names and Advantages
and Disadvatages of Computer
Submitted to: Sir Nadeem Khan
Submitted by: Muhammad Tariq
Roll No: 1007
2. Computer-Input Devices
Following are some of the important input devices which
are used in computer.
Keyboard
Mouse
Joy stick
Light pen
Track ball
Scanner
Keyboard:
Keyboard is the most common and very popular input device which helps to input data to the
computer.
Mouse:
Mouse is the most popular pointing device. It is very famous cursor-control device having a
small palm size box with a round ball at its base, which senses the movement of the mouse and sends
corresponding signal to the CPU when the mouse button are pressed.
Joystick:
Joystick is also pointing device. Which is used to move the cursor position on a moniter
screen.
Graphic Tablet
Microphone
Magnetic ink card reader
Optical character reader
Bar code reader
Optical Mark reader
3. Light pen:
Light pen is a pointing device similar to pen. It is used to select a display menu itmes.
Track ball:
Track ball is an input device that is mostly used in notebook or laptop instead of a mouse.
Scanner:
Scanner is an input device which works more like a photocopy machine.
Graphic tablets:
Graphic tablets is an input device which convert analog information into digital form.
Microphone:
Microphone is an input device to input sound that in then stored in a digital form.
Magnetic in Card Reader:
MICR input device is generally used in banks as there are large number of cheques to be
processed every day.
4. Optical character reader:
OCR is an input device used to read a printed text
Bar Code Reader:
Bar code reader is a device used for reading bar coded data. Bar code is generally used in
labeling goods, numbering the books etc.
Optical Mark Reader:
OMR is the special type of optical scanner used to recognize the type of mark made by pen or
pencil.
5. Computer- output Devices
Monitors
Graphic plotter
Printer
Monitors
Monitors commonly called as visual display unit are the main output device of the computer.
Printer
Printer is an output device which is used to print information on paper.
Graphic plotter
Plotter are used to print graphical output on paper.It interprets computer commands and
makes line drawings on paper using multicolored automated pens.
Speakers
Converts digital signals into audible sound waves.
Speakers
Headphones
Projector
6. Projector
A device that is used to project video output from the computer onto a wall or screen.
Advantages and Disadvantages of Computer
Advantages Disadvantages
Speed Health Issues
Accuracy Spread of Pornography
Stores Huge amount of Data Virus and Hacking Attack
Online Trading Computer Can Not Take Their Own
Decision NO IQ
Online Education Negative effect on environment
Research Crashed Networks
Internet Online Cyber Crime
In Business Computer cannot work on itself
