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Chapter 5Input
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What Is Input?
What is input?
p. 234 and 236 Fig. 5-1 Next
Input device is any hardware component that allows users to enter data and instructions
Data or instructions entered into memory of computer
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What Is Input?
What are the two types of input?
p. 234 Next
Unprocessed text, numbers, images, audio, and video
Instructions Programs Commands User responses
Data
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The Keyboard
How is the keyboard divided?
p. 236 Fig. 5-2 Next
Typing area Numeric keypad Function keys, special
keys that issue commands
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The Keyboard
What is the insertion point?
p. 237 Fig. 5-3 Next
Blinking vertical bar that indicates where next character you type will display
Pointer changes location and shape as you move mouse or other pointing device
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The Keyboard
What is a cordless keyboard?
p. 238 Fig. 5-4 Next
Communicate with a receiver attached to a port on the system unit
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Pointing Devices
What is a mouse?
p. 239 Fig. 5-5 Next
Pointing device that fits under palm of hand Pointing device controls
movement of pointer, also called mouse pointer
Mechanical mouse has rubber or metal ball on underside
mouse buttons
mouse pad
ball
wheel button
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Pointing Devices
What is an optical mouse?
p. 239 Fig. 5-6 Next
No moving mechanical parts inside
Senses light to detect mouse’s movement
More precise than mechanical mouse
Connects using a cable, or wireless
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Tiltwheel
Tiltwheel
Presswheelbutton
Presswheelbutton
Right-drag
Right-drag
Right-click
Right-click
Triple-click
Triple-click
Double-click
Double-click
Pointing Devices
What are common mouse operations?
p. 240 Fig. 5-7 Next
PointPoint
ClickClick
DragDrag
Rotate wheel
Rotate wheel
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Other Pointing Devices
What is a trackball?
p. 241 Fig. 5-8 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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Other Pointing Devices
What are a touchpad and a pointing stick?
p. 241 - 242 Figs. 5-9—5-10 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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Other Pointing Devices
What are a joystick and a wheel?
p. 242 Fig. 5-11 Next
Joystick is vertical lever mounted on a base
Wheel is steering-wheel-type input device Pedal simulates
car brakes and accelerator
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Other Pointing Devices
What is a control pad and a gamepad?
p. 242 Fig. 5-12 Next
Control pad on an audio player allows users to scroll through music, adjust volume, and customize settings
Gamepad a pointing device that controls the movement and actions of players or objects in games
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Other Pointing Devices
What is a light pen?
p. 242 Next
Handheld input device that can detect light Press light pen against
screen surface and then press button on pen
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Other Pointing Devices
What is a touch screen?
p. 243 Fig. 5-13 Next
Touch areas of screen with finger
Often used with kiosks
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Keyboard and Pointing Devices
What is a stylus and a digital pen?
p. 243 - 244 Fig. 5-14 and 5-15 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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Voice Input
How does voice recognition work?
p. 245 Fig. 5-18 Next
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Voice Input
What is a MIDI (musical instrument digital interface)?
p. 246 Fig. 5-19 Next
External device, such as electronic piano keyboard, to input music and sound effects
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PDAs, Tablet PCs, and Smart PhonesHow is data entered into a PDA?
p. 247 Fig. 5-20 Next
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PDAs, Tablet PCs, and Smart PhonesWhat is a portable keyboard and a docking station?
p. 248 Fig. 5-21 Next
A portable keyboard is a full-sized keyboard you conveniently attach to and remove from PDA
A docking station is an external device that holds a mobile computer
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PDAs, Tablet PCs, and Smart PhonesWhat is a smart phone?
p. 248 - 249 Fig. 5-22 Next
Users can input and send text messages, graphics, pictures, video clips, and sound files
Many have a built-in or attachable camera
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PDAs, Tablet PCs, and Smart PhonesWhat is a Tablet PC?
p. 249 – 250 Fig. 5-23 Next
Mobile computer that includes handwriting recognition software
Primary input device is a pressure-sensitive digital pen
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Digital Cameras
What is a digital camera?
p. 250 Fig. 5-24 Next
Allows you to take digital pictures
Images viewable immediately on camera Download to
computer Post pictures
to Web
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Digital Cameras
How does a digital camera work?
p. 251 Fig. 5-25 Next
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Digital Cameras
What is resolution?
p. 252 Fig. 5-26 Next
Sharpness and clarity of image The higher the resolution, the better the image
quality, but the more expensive the camera Pixel (picture element)
is single point in electronic image Greater the number of
pixels, the better the image quality
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Video Input
What is video input?
p. 253 Fig. 5-27 Next
Process of entering full-motion images into computer
Video capture card is adapter card that converts analog video signal into digital signal that computer can use
Digital video (DV) camera records video as digital signals
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Video Input
What is a PC video camera and a Web cam?
p. 253 Fig. 5-28 Next
PC video camerac—cdigital video camera used to capture video and still images, and to make video telephone calls on Internet Also called PC camera
Web camc—cvideo camera whose output displays on a Web page
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Video Input
What is video conferencing?
p. 254 Fig. 5-29 Next
Whiteboard is another window on screen that can display notes and drawings simultaneously on all participants’ screens
Two or more geographically separated people who use network or Internet to transmit audio and video data
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Scanners and Reading Devices
What is a scanner?
p. 255 Fig. 5-30 Next
Light-sensing device that reads printed text and graphics Used for image processing,
converting paper documents into electronic images
Drum
Flatbed
Pen or Handheld
Sheet-fed
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Scanners and Reading Devices
How does a flatbed scanner work?
p. 256 Fig. 5-31 Next
Step 1:Place the document to be scanned face down on the glass window. Using buttons on the scanner or the scanner program, start the scanning process.
Step 2:The scanner converts the document content to digital information, which is transmitted through the cable to thememory of the computer.
Step 3: Once in the memory of the computer, users can display the image, print it, e-mail it, include it in a document, or place it on a Web page.
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Scanners and Reading Devices
What is an optical reader?
p. 257 Fig. 5-32 Next
Optical character recognition (OCR) reads characters in OCR font
Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles
Device that uses light source to read characters, marks, and codes and then converts them into digital data
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Scanners and Reading Devices
What is a turnaround document?
p. 257 Fig. 5-33 Next
Document that you return to the company that sent it Portion you return has
information printed in OCR characters
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Scanners and Reading Devices
What is a bar code reader?
p. 258 Fig. 5-34 Next
Uses laser beams to read bar codes
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Scanners and Reading Devices
What is a bar code?
p. 258 Fig. 5-35 Next
Identification code that consists of a set of vertical lines and spaces of different widths
Universal Product Code (UPC)
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Other Input Devices
What is an RFID reader?
p. 259 Fig. 5-36 Next
Reads information on the tag via radio waves Can be handheld
devices or mounted in a stationary object
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Other Input Devices
What is a magnetic stripe card reader?
p. 260 Fig. 5-37 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?
Scanners and Reading Devices
p. 260 Fig. 5-38 Next
Can read text printed with magnetized ink Banking industry almost exclusively uses MICR
for check processing
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Scanners and Reading Devices
What is a data collection device?
p. 261 Fig. 5-39 Next
Obtains data directly at location where transaction or event takes place
Transmits data over network or Internet
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Terminals
What is a point of sale (POS) terminal?
p. 261 - 262 Fig. 5-40 Next
Records purchases, processes credit or debit cards, and updates inventory Swipe credit or debit
card through card reader
Reads customer’s personal data from magnetic strip
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Terminals
What is an automated teller machine (ATM)?
p. 262 Fig. 5-41 Next
Self-service banking machine that connects to a host computer through a network
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Biometric Input
What is biometrics?
p. 262 Fig. 5-42 and 5-43 Next
Authenticates person’s identity by verifying personal characteristic Fingerprint scanner captures
curves and indentations of fingerprint
Hand geometry system measures shape and size of person’s hand
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Biometric Input
What are examples of biometric technology?
p. 263 – 264 Figs. 5-44—5-45 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 eye Biometric data is sometimes stored
on smart card, which stores personal data on microprocessor embedded in card
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Input Devices for Physically Challenged Users
What input devices are available for those with physical limitations?
p. 266 Figs. 5-47 Next
Keyguard allows users to rest hands on keyboard without accidentally pressing keys
Head-mounted pointer controls pointer on screen
New developments include gesture recognition and computerized implant devices