Chapter 07: Input and
Output
McGraw-Hill
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
mputing Essentials 2012: Making IT Work for You
Competencies (Page 1 of 2)
• Define input
• Describe keyboard entry including the
different types of keyboards and
keyboard features
• Discuss pointing devices including mice,
touch screens, joysticks, and styluses
• Describe scanning devices including
optical scanners and card readers
• Discuss image capturing devices
including digital cameras and digital
video cameras
McGraw-Hill
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-2
mputing Essentials 2012: Making IT Work for You
Competencies
(Page 2 of 2)
• Define output
• Discuss monitors features, flat-panel,
CRT, e-book readers, data projectors,
and HDTVs
• Define printing features as well as
ink-jet, laser, dot-matrix, thermal,
plotter, photo, and portable printers
• Discuss audio-output devices
• Define combination input and output
devices
McGraw-Hill
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-3
mputing Essentials 2012: Making IT Work for You
Introduction
• Have you ever wondered
how information gets into
your computer or comes
out in a form you can use?
– Input devices convert what
we understand into what the
system unit can process
– Output devices convert what
the system unit has
processed into a form that
we can understand
McGraw-Hill
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-4
mputing Essentials 2012: Making IT Work for You
What is Input?
• Any data or instructions used by a
computer
• Input devices translate data into a
form that the
system unit can process
• Some hardware input devices include:
–
–
–
–
McGraw-Hill
Keyboards
Pointing devices
Scanning devices
Other devices
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-5
mputing Essentials 2012: Making IT Work for You
Keyboard Entry
(Page 1 of
2)
• Keyboards
–
–
–
–
–
Traditional keyboards
Ergonomic keyboards
Wireless keyboards
PDA keyboards
Virtual keyboards
• Features
– Typewriter keyboard with numeric
keypad
Special purpose keys
McGraw-Hill
ã Toggle
ã Combination Keys
Copyright â 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-6
mputing Essentials 2012: Making IT Work for You
Keyboard Entry
McGraw-Hill
Traditional Keyboard
(Page 2 of 2)
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-7
mputing Essentials 2012: Making IT Work for You
Pointing Devices
(Page 1
of 2)
• Mice
–
–
–
Mechanical
Optical
Cordless or wireless
• Three similar devices to mice
–
–
–
McGraw-Hill
Trackball
Touch pads
Pointing stick
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-8
mputing Essentials 2012: Making IT Work for You
Pointing Devices
(Page 2
of 2)
ã Joystick
ã Touch Screen
Multi-touch screen
ã Stylus
McGraw-Hill
Copyright â 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-9
mputing Essentials 2012: Making IT Work for You
Scanning Devices
of 2)
(Page 1
• Optical scanners
– Flatbed scanners
– Document scanners
– Portable scanners
• Card Readers
– Magnetic card readers
– Radio Frequency
card readers
McGraw-Hill
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-10
mputing Essentials 2012: Making IT Work for You
Scanning Devices
(Page 2
of 2)
• Bar code readers
– Handheld wand readers
or platform scanners
– Contain photoelectric cells
that read bar codes
• Character and mark
recognition devices
– Magnetic ink character recognition
(MICR)
– Optical-character recognition
(OCR)
– Optical-mark recognition (OMR)
McGraw-Hill
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-11
mputing Essentials 2012: Making IT Work for You
Image Capturing
Devices
• Digital cameras
– Images recorded digitally on a disk
– Images can be downloaded to a computer
• Digital video cameras
–
–
–
McGraw-Hill
Records motion digitally
Can take still images as well
WebCams
• Specialized digital
video cameras
• Broadcast images
over the Internet
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-12
mputing Essentials 2012: Making IT Work for You
Instant Messaging and
WebCams
• Exchange messages and files with
friends
• Voice and video capabilities
• Application sharing
McGraw-Hill
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-13
mputing Essentials 2012: Making IT Work for You
Audio-Input Devices
• Voice recognition systems
– Use a microphone, a sound card,
and special software
– Users can operate
computers and create
documents using
voice commands
McGraw-Hill
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-14
mputing Essentials 2012: Making IT Work for You
What is Output?
• Processed data or information
• Types of output
– Text
– Graphics/Photos
– Audio & video
ã Output devices
Monitors
Printers
Other Devices
McGraw-Hill
Copyright â 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-15
mputing Essentials 2012: Making IT Work for You
Monitors
•
•
•
(Page 1 of 2)
Known as screens or display screens
Output referred to as soft copy
Features
–
–
–
–
McGraw-Hill
Resolution/pixels
Dot pitch
Refresh rate
Size
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-16
mputing Essentials 2012: Making IT Work for You
Monitors
(Page 2 of 2)
• Cathode-ray tube (CRT) monitors
• Flat-panel monitors
– Require less power to operate
– Portable and thinner than CRTs
• Other monitors
–
–
–
McGraw-Hill
E-books readers
Data projectors
High-definition
television (HDTV)
Copyright © 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-17
mputing Essentials 2012: Making IT Work for You
Printers
(Page 1 of 2)
• Translates information that has been
processed by the system unit
• Output referred to as hard copy
ã Features
McGraw-Hill
Resolution
Color capability
Speed
Memory
Duplex printing
Copyright â 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-18
mputing Essentials 2012: Making IT Work for You
Printers
(Page 2 of 2)
• Ink-jet printer
• Laser printer
– Personal laser printers
– Shared laser printers
ã Thermal printer
ã Other printers
McGraw-Hill
Dot-matrix printers
Plotters
Photo printers
Portable printers
Copyright â 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-19
mputing Essentials 2012: Making IT Work for You
Audio-Output Devices
• Translates audio information from the
computer into sounds that people can
understand
• Common devices
Speakers
Headphones
ã Digital Music Player
iPod
iRiver
McGraw-Hill
Copyright â 2012 The McGraw-Hill Companies, Inc. All rights
reserved.
7-20