7 7 C H A P T E R INPUT AND OUTPUT
Mar 30, 2015
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INPUT AND OUTPUT
7-2
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
Competencies
Define input
Describe keyboard entry, pointing devices, & scanning devices
Discuss image capturing devices, digitizing devices, & audio input devices
7-3
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Competencies cont.
Define output
Describe monitors, printers, and audio output devices
Discuss combination input & output devices
7-4
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What is Input?
Any data or instructions used by a computer
Input devicesHardware
Keyboards
Mice
Scanners
Other devices
Translates data into a form that the system unit can process
7-5
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Keyboard Entry
KeyboardsTraditional keyboards
Flexible keyboards
Ergonomic keyboards
Wireless keyboards
PDA keyboards
FeaturesTypewriter keyboard with numeric pad
Special purpose keys
Toggle and combination keys
7-6
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Traditional Keyboard
7-7
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Pointing Devices
MouseMechanical
Optical
Cordless or wireless
Joystick
Touch Screen
Light Pen
7-8
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Scanning Devices
Optical scannersFlatbed
Portable
Bar code readersHandheld wand readers or platform scanners
Contain photoelectric cells that read bar codes
7-9
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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)
7-10
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Image Capturing Devices
Digital cameraImages recorded digitally on a disk
Images can be downloaded to a computer
Digital video camera Records motion digitally
Can take still images as well
WebCamsSpecialized digital video cameras
Broadcast images over the Internet
7-11
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Digitizing Devices
Graphics Tablets
Digital Notepads
7-12
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Audio Input Devices
VoiceVoice recognition systems
Discrete-speech recognition systems
Continuous-speech recognition system
MusicMusical Interface Digital Interface (MIDI)
7-13
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What is Output?
Processed data or information
Types of outputText
Graphics
Audio & video
Output devicesMonitors
Printers
7-14
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Monitors
Known as screens or display screens
Output referred to as soft copy
Features Resolution
Dot pitch
Refresh rate
Size
7-15
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More on Monitors
Cathode-ray tube or CRTs
Flat-panelLiquid crystal display (LCD)
Portable and thinner than CRTs
Other monitorsE-books
Data projectors
High-definition television (HDTV)
7-16
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Printers
Translates information that has been processed by the system unit
Output referred to as hard copy
FeaturesResolution
Color capability
Speed
Memory
7-17
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Printers
Ink-jet printer
Laser printerPersonal laser printers
Shared laser printers
Thermal printer
Other printersDot-matrix
Plotters
Photo printers
7-18
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Audio Output Devices
Translates audio information into sounds that people can understand
Common devicesSpeakers
Headphones
7-19
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Combination Input and Output Devices
Fax machines
Multifunction devices
Internet telephonesTelephony
Voice-over IP (VoIP)
Terminals
7-20
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Terminals
An input and output device
Connects to a mainframe or server
Types of terminalsDumb terminal
Intelligent terminal
Network terminal
Internet terminal
7-21
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A Look to the FutureNeural Signals Inc.
Brain machine interface
Allows humans to control machines with their thoughts
Individuals incapable of communication
Physically immobile people
7-22
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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)
7-23
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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)
7-24
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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)
7-25
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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)
7-26
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
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)
7-27
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
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)
7-28
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
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)
7-29
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
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)
7-30
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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?
7-31
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.
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?