This document discusses different types of computer input devices. It describes manual input devices like keyboards, mice, trackballs, joysticks, microphones, digital cameras and scanners that allow users to directly enter data. It also outlines automatic input devices such as MICR, OMR, OCR readers and barcode scanners that can automatically feed data into a computer. The document provides details on how each input device works and their advantages and disadvantages.

2. Input Devices
• Communication Skills
Faizan Atteeq
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3. Information Process Structure
Input
Process
Output

4. INPUT
Input:
Anything that is given to computer to
process and convert into information is
called input.
e.g text, speech, video and digital
signals.

5. Input Devices
Introduction to computer input devices
 A device that can be used to insert data
into a computer or other computational
device
 Any hardware device that sends data to
the computer, without any input devices,
a computer would only be a display
device and not allow users to interact
 Computer works with the commands an
the input given by the user

6. Input Devices
Types of input devices:
There are two types of input devices:
1. Manual Input:
 Keyboard
 Mouse
 Track Ball
 Joystick
 Microphone
 Digital Camera
 Scanner

7. Input Devices
2. Automatic Input:
 MICR (Magnetic Ink Character
Recognition)
 OMR (Optical Mark Recognition)
 OCR (Optical Character
Recognition)
 Barcode reader
 Magnetic Stripe
 Sensors

8. Manual

9. Keyboard
Used to input text data into the
computer
Advantage
 They are very common; all computers
have one and they are easy to use.
Disadvantage
 Easy to make mistakes if you can’t type
quickly.

10. Mouse
Enables you to control the movement
of the on screen curser by moving it
around a surface
Advantage
 Easy to learn to use
 Accurate for selecting things
Disadvantage
 Need a flat space next to the computer.

11. Track Ball
Like an upside down mouse, you
turn it with your hand to move the
pointer on the screen
• Advantage
 Ideal for using when flat space next
to computer is limited
• Disadvantage
 Not very easy to use.

12. Joystick
• Similar to a tracker ball in operation
except you have a stick which is
moved rather than a rolling ball.
• Advantage
 Faster than mouse and performs
immediate action .
• Disadvantage
 Some people find them more difficult
to use than mice.

13. Microphone
Used to input sound
• Advantages
 Some systems can understand most
peoples voices with voice recognition
software
• Disadvantages
 Some systems need to be trained to
understand each different voice.

14. Digital Camera
Looks very similar to a traditional
camera. However, unlike
photographic cameras, digital
cameras do not use film
 Advantage
 No film needed.
 Images can be digitally manipulated
 Disadvantage
 Need to print out photographs

15. Scanner
Another way in which we can capture
still images or text to be stored and
used on a computer.
• Advantage
 Can input things from paper
documents
 With OCR software, text can be
scanned in
• Disadvantage
 Images can take up a lot of memory
space.

16. AUTOMATIC

17. MICR
Stands for Magnetic Ink Character
Recognition. Banks use them; the
reader reads the numbers on a
cheque.
• Advantage
 Read at 100% accuracy..
• Disadvantage
 The reader and ink is expensive

18. OMR
Stands for Optical Mark Reader.
Reads pencil marks on a specially
designed form or document, e.g. on a
lottery ticket.
• Advantage
 Fast and accurate way of inputting
information.
• Disadvantage
 Only works if the marks have been
made accurately and clearly.

19. OMR Pattern

20. Barcode reader
A bar code reader uses a visible red
light to scan and read the barcode.
• Advantage
 Any price change only needs to be
changed on the computer system,
not on each item.
• Disadvantage
 Does not reads if surface is reflective
due to humidity or if oily.

21. Thank You For Precious
Time