7
INPUT AND
OUTPUT
7-2
Competencies
Define input
Describe keyboard entry, pointing devices, &
scanning devices
Discuss image capturing devices, digitizing
devices, & audio input devices
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7-3
Competencies cont.
Define output
Describe monitors, printers, and audio output
devices
Discuss combination input & output devices
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7-4
What is Input?
Any data or instructions used by a computer
Input devices
Hardware
Keyboards
Mice
Scanners
Other devices
Translates data into a form that the system unit can
process
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7-5
Keyboard Entry
Keyboards
Traditional keyboards
Flexible keyboards
Ergonomic keyboards
Wireless keyboards
PDA keyboards
Features
Typewriter keyboard with numeric pad
Special purpose keys
Toggle and combination keys
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7-6
Traditional Keyboard
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7-7
Pointing Devices
Mouse
Mechanical
Optical
Cordless
or wireless
Joystick
Touch Screen
Light Pen
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7-8
Scanning Devices
Optical scanners
Flatbed
Portable
Bar code readers
Handheld wand readers or platform scanners
Contain photoelectric cells that read bar codes
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7-9
Scanning Devices
Character and mark recognition devices
Scanners that recognize special characters &
marks
Magnetic ink character recognition (MICR)
Optical-character recognition (OCR)
Optical-mark recognition (OMR)
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7-10
Image Capturing Devices
Digital camera
Images recorded digitally on a disk
Images can be downloaded to a computer
Digital video camera
Records motion digitally
Can take still images as well
WebCams
Specialized digital video cameras
Broadcast images over the Internet
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7-11
Digitizing Devices
Graphics Tablets
Digital Notepads
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7-12
Audio Input Devices
Voice
Voice recognition systems
Discrete-speech recognition systems
Continuous-speech recognition system
Music
Musical Interface Digital Interface (MIDI)
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7-13
What is Output?
Processed data or information
Types of output
Text
Graphics
Audio & video
Output devices
Monitors
Printers
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7-14
Monitors
Known as screens or display screens
Output referred to as soft copy
Features
Resolution
Dot pitch
Refresh rate
Size
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7-15
More on Monitors
Cathode-ray tube or CRTs
Flat-panel
Liquid crystal display (LCD)
Portable and thinner than CRTs
Other monitors
E-books
Data projectors
High-definition television (HDTV)
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7-16
Printers
Translates information that has been processed
by the system unit
Output referred to as hard copy
Features
Resolution
Color capability
Speed
Memory
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7-17
Printers
Ink-jet printer
Laser printer
Personal laser printers
Shared laser printers
Thermal printer
Other printers
Dot-matrix
Plotters
Photo printers
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7-18
Audio Output Devices
Translates audio information into sounds that
people can understand
Common devices
Speakers
Headphones
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7-19
Combination Input and Output
Devices
Fax machines
Multifunction devices
Internet telephones
Telephony
Voice-over IP (VoIP)
Terminals
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7-20
Terminals
An input and output device
Connects to a mainframe or server
Types of terminals
Dumb terminal
Intelligent terminal
Network terminal
Internet terminal
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7-21
A Look to the Future
Neural Signals Inc.
Brain machine interface
Allows humans to control machines with their
thoughts
Individuals incapable of communication
Physically immobile people
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7-22
Key Terms
active matrix monitor
(190)
audio input device (185)
audio-output device
(193)
bar code (183)
bar code reader (183)
bar code scanner (183)
cathode ray tube monitor
(CRT) (189)
character recognition device
(183)
clarity (189)
color capability (printer)
(191)
combination device (193)
combination key (175)
continuous-speech
recognition system (188)
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7-23
Key Terms
cordless mouse (180)
data projector (190)
digital camera (184)
digital notepad (185)
digital video camera
(184)
digitizing device (185)
discrete-speech
recognition system (188)
display screen (189)
dot-matrix printer (192)
dot pitch (189)
dots-per-inch (dpi) (191)
download (184)
dual-scan monitor (190)
dumb terminal (195)
e-book (190)
e-book reader (190)
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7-24
Key Terms
facsimile (fax) machine
(194)
flat-panel monitor (190)
Flatbed scanner (183)
graphics tablet (185)
hard copy (191)
Headphones (193)
high-definition television
(HDTV) (190)
host computer (195)
image capturing device
(184)
ink-jet printer (191)
input device (178)
input (178)
intelligent terminal (195)
Internet telephone (194)
Internet telephony (194)
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
7-25
Key Terms
Internet terminal (195)
IP Telephony (194)
joystick (181)
keyboard (178)
laser printer (192)
light pen (182)
liquid crystal display
(LCD) (190)
Magnetic-ink character
recognition (MICR)
(183)
mark recognition device
(183)
mark sensing (183)
mechanical mouse (180)
memory (printer) (191)
Musical Interface Digital
Interface MIDI (188)
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
7-26
Key Terms
MIDI device (188)
monitor (189)
mouse (180)
mouse pad (180)
mouse pointer (180)
multifunction device
(MFD) (194)
network computer (195)
network terminal (195)
numeric keypad (178)
optical character
recognition (OCR) (183)
Optical-mark recognition
(OMR) (183)
optical mouse (180)
optical scanner (182)
output (188)
output device (188)
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
7-27
Key Terms
passive-matrix monitor
(190)
PC/TV (190)
personal laser printer
(192)
photo printer (192)
pixel (picture element)
(189)
platform scanner (183)
plotter (192)
pointing (180)
pointing device (180)
pointing stick (180)
portable scanner (183)
printer (191)
reader/sorter (183)
refresh rate (189)
resolution (monitor)(189)
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
7-28
Key Terms
resolution (printer) (191)
roller ball (180)
scanner (182)
scanning device (182)
screen (189)
server (195)
shared laser printer (192)
size (viewable size) (189)
soft copy (189)
speakers (193)
speed (printer) (191)
telephony (194)
terminal (195)
thermal printer (192)
thin client (195)
thin film resistor monitor
(TFT) (190)
toggle key (179)
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7-29
Key Terms
touch pad (180)
touch screen (181)
touch surface (180)
trackball (180)
Universal Product Code
(UPC) (183)
voice recognition system
(185)
voice-over IP (VoIP)
(194)
wand reader (183)
Web appliance (195)
WebCam (184)
Web camera (184)
Web terminal (195)
wireless mouse (180)
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
7-30
FAQs
What are pointing devices?
I would like to insert several images in a
document. How can I capture the images?
What are digitizing devices?
What is voice recognition?
What is the difference between a CRT and an
LCD display?
What is HDTV?
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
7-31
Discussion Questions
Describe the three different mouse types
designed for input.
How does Internet telephony work? Discuss.
Discuss the features of multifunctional devices.
Describe the features of a monitor that help to
make images appear clearer on the screen.
What are MIDI devices and how are they used?
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.