Computer input devices allow users to provide instructions and data to computers. The document discusses many common input devices like keyboards, mice, touchscreens, microphones, and scanners. It explains that input devices improve productivity and make computing accessible to diverse users. Understanding the various capabilities of input devices helps users select the tools best suited to their needs.

5. INTRODUCTION
Computer can’t understand our language.
It only understand machine language that can be done by
using some devices

6. DEFINITION
“ The instructions and data that are inserted is called “input”.
The devices that are used to input the data is called “ INPUT
DEVICES”
“ An input device Is a computer device or hardware that allow
the user to provide data instructions and input to the computer
system” .

8. INPUT DEVICES OF COMPUTER
Some widely used input devices of computer are :
1. Pointing Devices
2. Audio visual devices
3. Game controller
4. Scanner and reading devices

11. MOUSE
• First computer mouse is invented in 1964.
• Commonly used pointing device that fits
comfortably under the palm of your hand.
• Consist of :
Two buttons (left and right)
Scroll wheel
• With a mouse, user control the position of the
pointer on the computer screen.
• Connected with the desktop and laptop.

12. KEYBOARD
• Invented in 1867
• “A keyboard is the set of typewriter-
like keys that enables you to enter data
into computer and other devices.”
• Consists of keys :
Alphabetic keys
Numeric keys
. Punctuation keys
. Special keys
• Used for typing
• Used with desktop and laptop

13. TOUCHPAD
• Invented in 1982
• Small, flat rectangular pointing
device
• Sensitive to pressure and motion.
• An input device that found on
“Notebook computer”
• It allowing users to control the
cursor on the screen by moving
their fingers over the pad.

14. TOUCH SCREEN
• Inception in 1965 and
adoption in 1980’s.
• Can be input and output
• Use fingers or stylus
• Icons on the screen represent
buttons
• Used in ATM, PDAs and
Mobiles
• Advantages : 1. Faster entry
of options. 2 . Easier for
people to use

15. LIGHT PEN
• Invented in 1955
• Quite old technology
• Can be used as alternative to mice,touch
screen and graphics tablets.
• Contain sensor that send signals to the
computer whenever light changes are detected.
• only works on CRT monitors
• Used in selecting and drawing objects on CRT
screens.
• Advantages: 1. Small and easy to use
2. More accurate than touch screen

16. TRACKBALL
• Stationery pointing device
• Contains a ball on its top or side
• To move the pointer using the
trackball, you rotate the ball
with your finger,thumb or by
palm of your hand.
• Consist of One or more buttons
that work just like mouse button.

17. DIGITAL PEN
• Slightly larger than the stylus
• Avaliable in Two forms
•Some are pressure sensitive
. •others have built-in
digital camera
• Tablets PC’s use pressure
sensitive digital pen.

19. LIST OF AUDIO
VISUAL DEVICES
• Audio visual devices consist of:
1. Audio Input
2. Web Cam
3. Microphone
4. Digital camera
5. Graphic tablets

20. AUDIO INPUT
“Audio input is the process of entering any
type of sound into computer”
For example: 1. Speech 2. Music
3. Sound effects
• User enter sound into computer by using
devices such as microphone and tape
players.
• Some user enter sound into computer by
using electronic Piano keyboard.

21. WEB CAM
• Invented in 1993
• Smaller than video camera
• Digital camera that is connected to the
computer
• It can send live pictures by means of
intenet
• Uses : 1. Chatting online
2. Enable video conferencing
Allow people to keep in contact with each
other.

22. MICROPHONE
• Invented in 1877
• Can be used to input sound
• Connected directly to the computer
• Sounds converted from electrical Analogue
signal Into digital signal.

23. GRAPHICS TABLETS
• Invented in 1957
• Hand written images
• Resulting image appear on the
computer monitor for further use
• USES: 1. Computer graphics
2. Computer aided design
• Drawing are input rather than letters
as happens with scanner.

24. DIGITAL CAMERA
• Invented in 1975
• Used like traditional camera
• Photographs can be deleted if they are
not good.
• Also can be retaken.
• Can be connected directly to the
computer
• Has capacity to store many photographs.
• Can also take short video
• Used by personal Photography.

25. GAME
CONTROLLER
• Video games and computer games use Game
Controller.
“ An input device that directs movement and Action
of on- screen object .
• Games controller Includes
1.Game pad
2 . Joystick
3. Wheel

26. Game controller

27. GAMEPADS
• Held with both hands
• “Control the movement and action of players
in video games.”
• Gamepads communicate with the game
controller or a personal computer Via wired
and wireless technology.

28. JOYSTICK
Invented in 1967.
• “ An input device is Consisting of a sticks that
pivots on a base and reports it’s angle and
direction to this device it is controlling.
• Used to control video games
• Also know as Control column.
• Consist of one or more push-buttons

29. WHEELS
• Steering wheel type input device
• Used in driving cars, trucks and
other vehicles.

30. SCANNER
• Invented in 1957.
• Enter hard copy image
• Can also be used as OCRS
• Flatpad, place the document in
front of glass.
• Light source move underneath
• Use to scan old records
• Scan image for editing
• Allow image to be stored
• Used in faxes

31. READING DEVICES
• Devices that can capture data directly
from the source document includes
1. Barcode Reader
2. Megnetic strip card reader
3. Chip Reader

36. BIOMETRIC INPUT
• Invented in late 20th century.
• Use unique biological features such as
1. Fingerprints
2. Facial feature
3. Iris pattern for authentication and
identification
• Used in Security system and access
control.

37. IMPORTANCE OF
INPUT DEVICES

38. Input devices are the Critical component of Any
computing system for several reasons:
1. USER COMMUNICATION:Input device facilitates
communication between the user and the computer,
allowing user to input data,execute command and
interact with software application.
2. VERSATILITY: Different input devices cater to various
user preferences and needs, making computing
accessible to diverse range of user.

39. PRODUCTIVITY: Efficient input devices
enhance productivity by enabling users to
perform task quickly and accurately.
4. SPECIALIZED APPLICATION: Certain input
devices like graphics tablets and barcode
reader are tailored for specific industries,
improving workflow efficiency in those
domain .

40. ADVANTAGES OF
INPUT DEVICES
1. Speed up the Data Collection
2. Reduction of Errors
3. Combine the data as transaction

41. DISADVANTAGES
OF INPUT DEVICES
1. They use up desk space as they are quite
large. Like: keyboard
2. People with limited arm-wrist movement
can find difficulty in operating it.

42. CONCLUSION
• Computer input device play a crucial role in enabling users
to interact with digital system.
• From basics tools Like keyboard and mice to specialized
devices like graphics tablets and barcodes scanner, each
input device serve a unique purpose in enhancing user
productivity and facilitating efficient communication with
computers.
• Understanding the capabilities and applications of different
input devices empowers users to choose the tools that best
suits their needs and preferences.

43. CONCLUSION
• Computer input device play a crucial role in enabling users
to interact with digital system.
• From basics tools Like keyboard and mice to specialized
devices like graphics tablets and barcodes scanner, each
input device serve a unique purpose in enhancing user
productivity and facilitating efficient communication with
computers.
• Understanding the capabilities and applications of different
input devices empowers users to choose the tools that best
suits their needs and preferences.