This document discusses various input and output devices used in computing. It describes common input devices like keyboards, mice, touchpads, microphones and cameras. It also covers output devices such as monitors, printers and speakers. Input devices capture and translate information into a form that can be processed by computers, while output devices present processed information to users in an understandable form.

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5. Input Devices
• Input device captures information and translates it into a form
that can be processed and used by other parts of your computer.
Keyboards
Pointing devices
Game controllers
Scanners
Styluses
Microphones
Digital cameras
Web cams

7.  The keyboard is the most common input
device. Types of keyboards include:
• Wireless
• Multimedia and one-touch access
• Portable keyboards for PDAs

8. Types of Input Devices

9. Pointing Devices
 Various pointing devices are available
 Types of pointing devices:
• Mouse
Mechanical mouse
Optical mouse
Wireless mouse
• Trackball
• Touchpad
• Pointing stick

10. Game Controller
 Game controllers are used mainly to play games
 Types of gaming devices
• Gamepads
• Joysticks
• Gaming wheels
• Force feed

11. Specialized Input Devices
 Other types of input devices include:
• Scanners
• Styluses
• Microphones
• Digital cameras
• Web cams

12. Scanner
•Scanner is a light sensitive device that helps you
copy or capture images, photos, and artwork
that exist on paper. Types of scanners include:
Flatbed

13. Styluses
• Stylus is an input device consisting of a thin
stick that uses pressure to enter information
or to click and point
• Styluses are used with:
PDAs
Tablet PCs
Graphics tablets

14. Microphones
• Microphones are used to
input audio
• Three main types of
microphones are:
Desktop microphones
Headsets
Directional microphones
• Speech recognition is
increasingly being included in
application software

16. Output Devices
 Output devices take
information within your
computer and present it to you
in a form that you can
understand
 Main output devices:
 Monitors
 Printers
 Speakers

18. Flat Panel Display Devices
 Devices with flat-panel displays
• Tablet PCs
• PDAs
• Cellular phones
• Desktop computers

19. Monitors
 CRTs
 Flat-panel displays
 Gas plasma
 LCD (liquid crystal display)
 Passive matrix
 Active matrix
 Called TFT (thin film transistor)
 Separate transistor for every pixel

20. Printers
 Inkjet – most popular
 Makes images by forcing droplets through nozzles
 Top speed is 20 pages per minute
 Laser
 Forms images using an electrostatic process
 Prints between 3 and 30 pages per minute

21. Speakers
 A speaker is a device that
produces computer output as
sound
 Speakers are common
devices in computer systems
Examples include:
• Built-in speaker
• Two-device set speakers
• Surround sound speakers

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