discovering computers fundamentals fifth edition chapter 5 input and output
TRANSCRIPT
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Discovering Computers
FundamentalsFifth Edition
Chapter 5Input and
Output
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Chapter 5 Objectives
List the characteristicsof a keyboard
List the characteristicsof a keyboard
Summarize how these pointing devices
work: mouse, trackball, touchpad, pointing stick, light pen, touch screen, stylus, digital pen, and
gaming and media player controllers
Summarize how these pointing devices
work: mouse, trackball, touchpad, pointing stick, light pen, touch screen, stylus, digital pen, and
gaming and media player controllers
Describe other types of input, including voice input; input devices for smart phones, PDAs, and Tablet PCs; digital cameras; video input;
scanners and reading devices; terminals; and biometric input
Describe other types of input, including voice input; input devices for smart phones, PDAs, and Tablet PCs; digital cameras; video input;
scanners and reading devices; terminals; and biometric input
Describe the characteristics of LCD monitors, LCD screens, and CRT
monitors
Describe the characteristics of LCD monitors, LCD screens, and CRT
monitors
Summarize the various types of printersSummarize the various types of printers
Explain the characteristics of speakers, headphones, and earphones; fax
machines and fax modems, multifunction peripherals; data
projectors; and interactive whiteboards
Explain the characteristics of speakers, headphones, and earphones; fax
machines and fax modems, multifunction peripherals; data
projectors; and interactive whiteboards
Identify input and output options for physically challenged users
Identify input and output options for physically challenged users
Next
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What Is Input
What is input?
p. 166 Fig. 5-1 Next
Input device is any hardware component that allows users to enter data and instructions
Data or instructions entered into the memory of computer
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Keyboard and Pointing Devices
What is a keyboard?
p. 168 Fig. 5-2 Next
Input device that contains keys users press to enter data into a computer
Includes typing area, numeric keypad, and function keys
Can be cordless or built-in
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Keyboard and Pointing Devices
What is a mouse?
p. 169 Fig. 5-3 Next
Pointing device that fits under the palm of your hand Pointing device controls
movement of pointer
Mechanical mouse Optical mouse Laser mouse Air mouse
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Air Mousebelow Chapter 5
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Keyboard and Pointing Devices
What is a trackball?
p. 170 Fig. 5-4 Next
Stationary pointing device with a ball on its top or side
To move pointer, rotate ball with thumb, fingers, or palm of hand
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Keyboard and Pointing Devices
What are a touchpad and a pointing stick?
p. 170 Figs. 5-5—5-6 Next
Touchpad is small, flat, rectangular pointing device sensitive to pressure and motion
Pointing stick is pointing device shaped like pencil eraser positioned between keys on keyboard
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Keyboard and Pointing Devices
What is a light pen?
p. 170 Next
Handheld input device that can detect the presence of light Press light pen against screen surface and then press
button on pen
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Keyboard and Pointing Devices
What is a touch screen?
p. 170 - 171 Fig. 5-7 and 5-8 Next
Touch areas of screen with finger
Often used with kiosks Microsoft Surface is a
30-inch tabletop display that allows one or more people to interact with the screen using their fingers or hands
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Microsoft Surface below Chapter 5
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Keyboard and Pointing Devices
What is a digital pen?
p. 171 Fig. 5-9 Next
Looks like a ballpoint pen, but uses pressure to write text and draw lines
Used with graphics tablets, flat electronic boards
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Gaming and Media Player ControllersWhat are the types of game controllers?
p. 172 Fig. 5-10 Next
Gamepads Joysticks and
Wheels Light gun Dance pad Motion-sensing
game controller
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Wii Remotebelow Chapter 5
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Gaming and Media Player ControllersWhat is a touch-sensitive pad?
p. 172 Fig. 5-11 Next
Input device on a portable media player that enables users to scroll through and play music, view pictures, watch videos or movies, adjust volume, and customize settings Click Wheel
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Other Types of Input
What is voice input? Entering input by speaking into a microphone Voice recognition or speech recognition is the
computer’s capability to distinguish spoken words
p. 173 Next
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Other Types of Input
p. 173 Fig. 5-12 Next
What is audio input? Entering sounds into a computer - speech,
music, and sound effects MIDI - standard defining how digital musical
devices represent sound electronically
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Other Types of Input
How is data entered into a smart phone?
p. 174 Fig. 5-13 Next
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Other Types of Input
What is a Tablet PC?
p. 174 -175 Fig. 5-15 Next
Mobile computer Primary input device is a
pressure-sensitive digital pen
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Other Types of Input
What is a digital camera?
p. 175 Fig. 5-16 Next
Allows you to take digital pictures
Images viewable immediately on camera Download to
computer Post pictures
to Web
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Other Types of Input
What is resolution?
p. 176 Next
Number of horizontal and vertical pixels in a display device
Resolutions range from 4 million to more than 16 million pixels (MP)
Pixel (picture element) is smallest element in electronic image Greater the number of pixels, the better the image
quality
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Other Types of Input
What is video input?
p. 176 Next
Process of capturing full-motion images and storing them on a computer’s storage medium
Digital video (DV) camera records video as digital signals
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Other Types of Input
What is a Web cam?
p. 176 Fig. 5-17 Next
Web cam is used to capture video and still images, send e-mail messages with video attachments, add live images to instant messages, broadcast live images over the Internet, and to make video telephone calls on Internet
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Web Cams below Chapter 5
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Other Types of Input
Video: Video Editing on Your Computer
Next
CLICK TO START
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Other Types of Input
What is video conferencing?
p. 176 Fig. 5-18 Next
Two or more geographically separated people who use a network or the Internet to transmit audio and video data
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Other Types of Input
What is a scanner?
p. 177 Fig. 5-19 Next
Light-sensing device that reads printed text and graphics Used for image processing,
converting paper documents into electronic images
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Other Types of Input
What is a turnaround document?
p. 177 Fig. 5-20 Next
Document that you return to the company that sent it Portion you return has
information printed in OCR characters
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Other Types of Input
What is an optical reader?
p. 177 - 178 Fig. 5-21 Next
Optical character recognition (OCR) reads typewritten characters
Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles
Bar code reader
Device that uses light source to read characters, marks, and codes and then converts them into digital data
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Other Types of Input
What is an RFID reader?
p. 178 Fig. 5-22 Next
Reads information on the tag via radio waves Can be handheld
devices or mounted in a stationary object
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Other Types of Input
What is a magnetic stripe card reader?
p. 179 Fig. 5-23 Next
Reads the magnetic stripe on the back of a credit card
Exposure to a magnetic field can erase the contents of a card’s magnetic stripe
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What is a magnetic-ink character recognition (MICR) reader?
Other Types of Input
p. 179 Fig. 5-24 Next
Can read text printed with magnetized ink Banking industry almost exclusively uses MICR
for check processing
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Other Types of Input
What is a point of sale (POS) terminal?
p. 180 - 181 Fig. 5-25 Next
Records purchases, processes credit or debit cards, and updates inventory
Fingerprint can be linked to a payment method
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Other Types of Input
What is an automated teller machine (ATM)?
p. 180 Fig. 5-26 Next
Self-service banking machine that connects to a host computer through a network
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Other Types of Input
What is biometrics?
p. 181 Fig. 5-27 Next
Authenticates person’s identity by verifying a personal characteristic Fingerprint reader captures
curves and indentations of a fingerprint
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Biometric Input below Chapter 5
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Other Types of Input
What are examples of biometric technology?
p. 181 Fig. 5-28 Next
Voice verification system compares live speech with stored voice pattern
Signature verification system recognizes shape of signature
Iris recognition system reads patterns in blood vessels in back of retina Biometric data is sometimes stored
on smart card, which stores personal data on microprocessor embedded in card
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What is Output
What is output?
p. 182 Fig. 5-29 Next
Data that has been processed into a useful form
Output device is any hardware component that can convey information to one or more people
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Display Devices
What is a display device?
p. 183 - 184 Fig. 5-31 Next
Output device that visually conveys text, graphics, and video information Typically used with desktop computers
Monitor houses display device as separate peripheral
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Display Devices
What is an LCD monitor?
p. 184 -185 Fig. 5-30 Next
Uses liquid crystal display Have a small footprint Mobile devices that contain
LCD displays include Notebook computer, Tablet
PC, ultra personal computer, portable media player, smart phone, and PDA
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Widescreen LCD Monitors below Chapter 5
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Display Devices
Video: SID: Size Matters
Next
CLICK TO START
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Display Devices
What is a plasma monitor?
p. 185 Fig. 5-32 Next
Uses gas plasma technology Larger screen size and richer colors than LCD, but are more
expensive
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Display Devices
What is a CRT monitor?
p. 186 Fig. 5-33 Next
Contains cathode-ray tube (CRT)
Common sizes are 15, 17, 19, 21, and 22 inches Viewable size is diagonal
measurement of actual viewing area
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Display Devices
What is the ENERGY STAR program?
p. 186 Next
Encourages manufacturers to create energy-efficient devices that require little power when not in use
Monitors and devices meeting guidelines display ENERGY STAR label
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Printers
What is a printer?
p. 187 Fig. 5-34 Next
Output device that produces text and graphics on a physical medium
Purchasing a printer
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Printers
What are the various ways to print documents and pictures?
p. 188 Fig. 5-35 Next
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Printing Wirelesslybelow Chapter 5
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Printers
What is a nonimpact printer?
p. 189 - 190 Fig. 5-36 Next
Forms characters and graphics without striking paper Ink-jet printer sprays tiny drops of liquid ink
onto paper Prints in black-and-white or color on a variety
of paper types
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Ink-Jet Printersbelow Chapter 5
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Printers
What is a photo printer?
p. 190 Fig. 5-37 Next
Color printer that produces photo-lab-quality pictures Many photo printers have a built-in card slot PictBridge is a standard technology that allows you to
print pictures directly from a digital camera
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Printers
What is a laser printer?
p. 190 - 191 Fig. 5-38 Next
High-speed, high-quality nonimpact printer
Prints text and graphics in high-quality resolution, ranging from 1200 to 2400 dpi
Typically costs more than ink-jet printer, but is much faster
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Laser Printersbelow Chapter 5
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Printers
What is a thermal printer?
p. 191 Fig. 5-39 Next
Generates images by pushing electrically heated pins against heat-sensitive paper Dye-sublimation printer,
(also called a digital photo printer) uses heat to transfer dye to specially coated paper
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Printers
What is a mobile printer?
p. 192 Fig. 5-40 Next
Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, or smart phone or other personal mobile device while traveling
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Printers
What is a plotter?
p. 192 Fig. 5-41 Next
Sophisticated printer used to produce high-quality drawings
Large-format printer creates photo-realistic-qualitycolor prints
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Printers
What is an impact printer?
p. 192 - 193 Fig. 5-42 Next
Forms characters by striking mechanism against inked ribbon that contacts paper Dot-matrix printer produces
printed images when tiny wire pins strike ribbon
Line printer prints entire lineat a time
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Other Output Devices
What is an audio output device?
p. 193 - 194 Fig. 5-43 Next
Computer component that produces music, speech, or other sounds
Speakers, earphones, and earbuds are common devices
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Earphones below Chapter 5
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Other Output Devices
What is a facsimile (fax) machine?
p. 194 Next
Device that transmits and receives documents over telephone lines
What is a fax modem? Modem that allows you to send and receive electronic
documents as faxes
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Other Output Devices
What is a multifunction peripheral?
p. 194 Fig. 5-45 Next
Provides functionality of a printer, scanner, copy machine, and fax machine
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Other Output Devices
What is a data projector?
p. 195 Fig. 5-46 Next
Device that takes the text and image from computer screen and projects it onto larger screen
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Other Output Devices
What is an interactive whiteboard?
p. 195 Fig. 5-47 Next
Touch-sensitive device that displays the image on a connected computer screen
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Putting It All Together
What are suggested input and output devices for the home user?
p. 196 Fig. 5-48 Next
Home User Input Device Output Device
• Enhanced keyboard or ergonomic keyboard
• Mouse• Stylus for smart phone
or other personal mobile device
• Game controller• Color scanner• 4-megapixel digital
camera• Headphones that
include a microphone• Web cam• Fingerprint reader
• 17- or 19-inch color LCD monitor, or 17-inch LCD screen on notebook computer
• Ink-jet color printer; or• Photo printer• Speakers• Headphones or
earphones
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Putting It All Together
What are suggested input and output devices for the small office/home office user?
p. 196 Fig. 5-48 Next
SOHO User Input Device Output Device• Enhanced keyboard or
ergonomic keyboard• Mouse• Stylus and portable
keyboard for smart phone or other personal mobile device, or digital pen for Tablet PC
• Color scanner• 5-megapixel digital
camera• Headphones that
include a microphone• Web cam
• 19- or 22-inch LCD monitor
• LCD screen on Tablet PC, smart phone, or other personal mobile device
• Multifunction peripheral; or
• Ink-jet color printer; or• Laser printer (black-
and-white or color)• Fax machine• Speakers
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Putting It All Together
What are suggested input and output devices for the mobile user?
p. 196 Fig. 5-48 Next
Mobile User Input Device Output Device• Wireless mouse for
notebook computer• Touchpad or pointing stick
on notebook computer• Stylus and portable
keyboard for smart phone or other personal mobile device, or digital pen for Tablet PC
• 4- or 5- megapixel digital camera
• Headphones that include a microphone
• Fingerprint reader for notebook computer
• 17-inch LCD screen on notebook computer
• LCD screen on smart phone or other personal mobile device
• Mobile color printer• Ink-jet color printer; or• Laser printer, for in-office
use (black-and-white or color)
• Photo printer• Fax modem• Headphones or
earphones• Data projector
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Putting It All Together
What are suggested input and output devices for the power user?
p. 196 Fig. 5-48 Next
Power User Input Device Output Device
• Enhanced keyboard or ergonomic keyboard
• Mouse• Stylus and portable
keyboard for smart phone or other personal media device
• Pen for graphics tablet• Color scanner• 6- to 12-megapixel
digital camera• Headphones that
include a microphone• Web cam
• 27-inch LCD monitor• Laser printer (black-
and-white or color)• Plotter or large-format
printer; or• Photo printer; or• Dye-sublimation printer• Fax machine or fax
modem• Speakers• Headphones or
earphones
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Putting It All Together
What are suggested input and output devices for the large business user?
p. 196 Fig. 5-48 Next
Large Business User Input Device Output Device
• Enhanced keyboard or ergonomic keyboard
• Mouse• Stylus and portable keyboard
for smart phone or other personal mobile device, or digital pen for Tablet PC
• Touch screen• Light pen• Color scanner• 6- to 12- megapixel digital
camera• OCR/OMR readers, bar code
readers, or MICR reader• Microphone• Video camera for video
conferences• Fingerprint reader or other
biometric device
• 19- or 22-inch LCD monitor
• LCD screen on Tablet PC, smart phone, or other personal mobile device
• High-speed laser printer• Laser printer, color• Line printer (for large
reports from a mainframe)• Fax machine or fax
modem• Speakers• Headphones or
earphones• Data projector• Interactive whiteboard
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Input and Output Devices for Physically Challenged Users
What input devices are available for those with physical limitations?
p. 197 Fig. 5-49 Next
Keyboards with larger keys Head-mounted pointer controls
pointer on screen
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Input and Output Devices for Physically Challenged Users
What other output options are available for visually impaired users?
p. 197 Fig. 5-50 Next
Change Windows Vista settings, such as increasing size or changing color of text to make words easier to read
Blind users can work with voice output
Braille printer outputs information in Braille onto paper
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Processing and organizinginput into output
Processing and organizinginput into output
Summary of Input and Output
Data and instructionsData and instructions
Various techniques of inputVarious techniques of input
Commonly used input devicesCommonly used input devices
Various methods of outputVarious methods of output
Commonly used output devicesCommonly used output devices
Chapter 5 Complete