This slide will make you more clear about different input devices. It will broaden the knowledge on what input devices really are.

1. INPUT DEVICES
Presented by: Group-E (The Anonymous)
BSc.CSIT 1st Semester
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2. What is input and input devices ?
Most popular input devices
Keyboard
Mouse
Trackball
Magnetic-Ink Character Recognition(MICR)
Optical Character Recognition(OCR)
Digitizing tablet
Touch pad
Optical Mark Recognition (OMR)
References
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3. What is taken in, or operated on by any process or system
Technically, giving command or instruction to the
computer
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What is input?

4. Peripheral to provide data and signals to an information processing
system.
Used for entering data and program into the computer system for
processing.
Medium of communication between user and computer
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What are input devices ?

5. Human interface device represented as a layout of buttons
Typewriter like device composed of a matrix of switches
Consists of different types of keys
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Keyboard

6. Alphanumeric keys
Modifier keys – shift, Ctrl, Alt
Numeric keys
Functional keys – F1 to F2
Cursor Movement keys - Home, End
Special purpose keys – Ins, Del, Esc
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Types of keys in keyboard

7. Laptop keyboards
Gamming keyboards
Ergonomic keyboards
Laser / Infrared keyboards
Rollup keyboards
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Types of keyboard

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Mouse

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About mouse
 Invented by Douglas Engelbart in 1964
 It is an input device that is most often
used with a personal computer
 Small hand hold pointing and clicking device
 To control the position of cursor on the screen
 By pressing the bottom of mouse, the user fulfills gives
command to the computer

10. It has a rubber or metal ball on
its underside and it can roll in
every direction
Mechanical mouse
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Types of mouse

11. It is same as mechanical mouse except that it
use optical sensors to the motion of ball
It demands a mouse pad under the mouse to run
on
Opto Mechanical mouse
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12. With advance in mouse technology , now –
preferred device for pointing and clicking is
optical mouse
Optical Mechanical mouse
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13.  A pointing input device like an upside down
mouse
 Contains sensors to detect a rotation of the ball
 User have to roll the ball with the thumb fingers or with the
palm of the hand to move a cursor
 Invented by tom Cranston and Fred Longstaff in 1952
 Eleven years before the mouse was invented
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Track Ball

14. Advantage
● Doesn’t require much space
● Can be used in any type of surface or even in hand (like
remote)
● Disadvantage
● fatigue of the thumb
● Trackballs tend not to skip and flow more smoothly than
mice or touch pads
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Advantage and Disadvantage

15. Allows computer to recognize characters printed using magnetic
ink.
Special purpose machine known as reader/sorter reads character
made of ink containing magnetic particle.
This technology is usually used in bank to read the number on the
bottom of cheque.
Some other related technology are magnetic strips used in credit
and debit cards of bank and ID card of students.
Magnetic Ink Character Recognition (MICR)

16. OCR refers to the branch of computer science involves reading
text from paper and translating the image into a form that the
computer can manipulate.
OCR system include optical scanner for reading text , and
advance software for analyzing image.
It is widely used in all sector enabling user to print documents.
Optical Character Recognition (OCR)

17. Also known as graphic tablet or drawing tablet or digital art
board
Enables a user to hand-draw images, animations and
graphics, with a special pen-like stylus, similar to the way a
person draw images with a pencil and paper.
Also popular for technical drawings and CAD (one can
typically put a piece of paper on them without interfering with their
function)
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Digitizing tablet

18. Light pen or stylus pen
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Touch pad
A pointing device featuring a tactile sensor with specialized surface
Can translate the motion and position of a user's fingers to a relative
position on the operating system that is outputted to the screen
Used as a substitute for a mouse

21. Works with a dedicated scanner device that shines a beam of light
onto the form paper
OMR software makes OMR device to work on the desktop
OMR software uses an Image scanner to process surveys, tests,
attendance sheets, checklists, and other plain-paper forms printed on
a laser printer
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Optical Mark Recognition

22. www.google.com
www.Wikipedia.com
www.youtube.com
Course book (Introduction to Information and Technology-
Alexis Leon and Mathew Leon)
Teachers note
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Preferences

23. Queries
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