Slide 3
Chapter 3 Objectives
Input devices and their roles in getting different types of information into the
computer Output devices and the ways they make
computers more useful The functionality of different types of
storage devices The ways the components of a computer
system fit together
© 2006 Prentice-Hall, Inc.
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Chapter 3 Input: From Person to Processor
Keyboard
The most familiar input device
Used to enter letters, numbers and special characters
© 2006 Prentice-Hall, Inc.
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Chapter 3 Input: From Person to Processor
Standard keyboard Ergonomic keyboards
To address possible medical problems
Wireless keyboard Folding keyboards
Used with palm-sized computers
One-handed keyboards Keyboards printed on membranes
© 2006 Prentice-Hall, Inc.
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Chapter 3 Input: From Person to Processor
Pointing Devices
Mouse Touchpad
Pointing stick Trackball
Joystick Graphics tablet
Touch screen
Stylus
© 2006 Prentice-Hall, Inc.
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Chapter 3 Input: From Person to Processor
Reading Tools
Reads marks representing codes
specifically designed
for computer input
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Chapter 3 Input: From Person to Processor
Optical-mark readers Magnetic-ink character
readers Bar-code readers
Pen scanners Tablet PC
Smart whiteboard Radio Frequency
Identification Readers
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Chapter 3 Input: From Person to Processor
Digitizing the Real World
Scanners capture and digitize printed images
Flatbed Slide
Drum Sheet-fed
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Chapter 3 Input: From Person to Processor
Digital camera
Snapshots captured as digital images
Digital images stored as bit patterns on disks or
other digital storage media
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Chapter 3 Input: From Person to Processor
Video digitizer
Capture input from a:
Video camera Video cassette recorder or television
Convert it to a digital signal
Stored in memory and displayed on computer screens
Videoconferencing
People in diverse locations can see and hear each other
Used to conduct long-distance meetings
Video images transmitted through networks
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Chapter 3 Input: From Person to Processor
