The document provides an overview of various input devices used in computing, defining input as data provided to a system and detailing devices like keyboards, mice, and optical recognition tools. It highlights the types, functions, and technologies behind each device, including their advantages and disadvantages. Additionally, it mentions the historical context and different applications of input technologies in data processing.

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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