Input devices allow users to enter data and instructions into a computer. Common input devices include keyboards, pointing devices like mice and touchpads, touch screens, cameras, microphones, and scanners. Keyboards are typically used to type and enter text, while pointing devices like mice allow users to control screen navigation. Emerging technologies are expanding input options with devices like touch screens, motion-sensing remotes, and biometric scanners.

1. Input
Devices
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2. What Is Input?
• Input is any data and instructions entered into the
memory of a computer.
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3. What Is Input?
An input device
is any hardware
component that
allows users to
enter data and
instructions into
a computer.
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4. Keyboard
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5. Keyboard
• Most desktop computer keyboards have…
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7. Keyboard Types:
1. QWERTY keyboard
Pronounced kwer-tee, refers to the arrangement
of keys on a standard English computer keyboard
or typewriter.
The term comes from the fact the first 6 letters of
the top row of keys are Q, W, E, R, T, and Y.
The QWERTY design was patented by Christopher
Sholes in 1874.
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8. Keyboard Types
2. DVORAK keyboard
is designed so that the middle row of keys
includes the most common letters. In
addition, common letter combinations are
positioned in such a way that they can be typed
quickly.
The Dvorak keyboard was designed in the 1930s
by August Dvorak, a professor of education, and
his brother-in-law, William Dealy.
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9. Keyboard Types
QWERTY keyboard DVORAK keyboard
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10. Connection Keyboards
1. Wireless Keyboards
These use three basic types of connections:
• Bluetooth - is a wireless technology for exchanging
data over short distances.
• Infrared (IR) - radiation is a type of electromagnetic
radiation (a wave with electricity) .
• Radio Frequency - band of frequencies that lie in the
range 10 kilohertz to 300 000 megahertz and can be
used for radio communications and broadcasting.
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11. Connection Keyboards
Bluetooth
Infrared
Radio Frequency
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12. Connection Keyboards
2. Wired Keyboards
• PS/2 (Personal System/2) - is an electronic receptacle or
plug found on computers.
- It accepts a PS/2 cable with a mini-DIN connector, and is
most often used to plug in a keyboard or mouse.
• USB (Universal Serial Bus) - is a standard cable connection
interface on personal computers and consumer electronics.
- allows stand-alone electronic devices to be connected
via cables to a computer (or to each other).
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13. Connection Keyboards
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14. Pointing Devices
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15. Pointing Devices
• A mouse is a pointing device that fits under the
palm of your hand comfortably.
– Most widely used pointing device on desktop
computers.
• A mouse can be wired or wireless.
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16. Pointing Devices
Touchpad
Pointing Stick
• A touchpad is a • A pointing stick is a
Trackball
• A trackball is a
stationary pointing small, flat, rectangular pressure-sensitive
device with a ball on pointing device that is pointing device
its top or side. sensitive to pressure shaped like a pencil
and motion. eraser that is
positioned between
keys on a keyboard.
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17. Touch Screens and Touch-Sensitive Pads
• A touch screen is a touch-sensitive display device.
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18. Pen Input
• With pen input, you touch a stylus or digital pen on a flat
surface to write, draw, or make selections.
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19. Touch Screens and Touch-Sensitive Pads
Microsoft Surface • Microsoft Surface is an
upcoming series of tablets
designed and marketed by
Microsoft.
• Microsoft Surface is with a
high-end graphics display that
is built into something similar
to a coffee table. And users
interact with the applications
by using only their fingers and
other objects.
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20. Touch Screens and Touch-Sensitive Pads
Touch-Sensitive Pad
a specialized surface that
can translate the motion
and position of a user's
fingers to a relative
position on screen.
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21. Other Types of Input
• Video games and computer games use a game controller
as the input device that directs movements and actions
of on-screen objects.
Gamepad Joystick Light gun
Dance Wii
pad Remote
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23. Other Types of Input
• A digital camera is a mobile device that allows
users to take pictures and store them digitally.
Studio camera
Field camera
Point-and-shoot camera
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25. Other Types of Input
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26. Other Types of Input
• Two factors affect the quality of digital camera photos:
• Resolution refers to the
number of pixels in an
image.
• Pixel is a tiny dot that
Resolution make up the
representation of an
image in a computer's
memory.
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27. Other Types of Input
• Voice input is the process of entering input by
speaking into a microphone.
• Voice recognition is the computer’s capability of
distinguishing spoken words.
• Audio input is the process of entering any sound
into the computer.
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29. Other Types of Input
• Music production software allows users to
record, compose, mix, and edit music and sounds.
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30. Other Types of Input
• Video input is the process of capturing full-motion images and
storing them on a computer’s storage medium.
Record video on a digital video (DV) camera or use a
video capture card to convert analog signals to digital.
Connect the camera to a port on the system unit.
Transfer video and images.
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31. Video: Video Editing on Your Computer
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32. Other Types of Input
• A Web cam is a video camera that feeds its
images in real time to a computer. It enables a
user to:
Send e-mail messages with video
Capture video and still images
attachments
Add live images to instant messages Broadcast live images over the Internet
Make video telephone calls
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33. Other Types of Input
• A video conference is a meeting between two or
more geographically separated people.
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34. Other Types of Input
• A scanner creates a file of the document in
memory.
– Works in a manner similar to a copy machine.
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35. Other Types of Input
• Optical character recognition (OCR) involves reading
characters from ordinary documents.
• A turnaround document is a document you return to the
company that creates and sends it.
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36. Other Types of Input
• Optical mark recognition (OMR) reads hand-drawn
marks such as small circles or rectangles.
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37. Other Types of Input
• A bar code reader, also
called a bar code
scanner uses laser
beams to read bar
codes.
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38. Other Types of Input
Magnetic stripe
card reader reads
the magnetic
stripe on the back
of cards such as:
Credit cards
Entertainment cards
Bank cards
Other similar cards
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39. Magnetic Stripe Cards
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40. Other Types of Input
• MICR (magnetic ink character recognition) devices read text
printed with magnetized ink.
• An MICR reader converts MICR characters into a form the
computer can process.
• Banking industry uses MICR for check processing.
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41. Other Types of Input
• Biometrics authenticates a person’s identity by
verifying a personal characteristic such as:
Face Hand
Fingerprint
Recognition Geometry
Reader
System System
Voice Signature
Verification Retinal
Verification
System Scanner
System
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