csc chap3

• Input


  Any data or instructions used by a computer
• Input devices


  Translate data into a form that the system unit can process
• Hardware input devices


  • Keyboards
  • Mouse
  • Pointing
  • Scanning
  • Image capturing
  • Audio-input
  • Biometric
• Keyboards


  • Traditional
  • Laptop
  • Virtual
  • Thumb
• Pointing devices


  • Provide an intuitive interface by accepting pointing gestures and converting them into machine-readable input
• Mouse types


  • Optical
  • Wireless
  • Touch pads
• Touch screen


  • Can be touched with more than one finger
  • Common on mobile devices
• Stylus


  • Pen-like device used on tablets with handwriting recognition software
• Gaming controllers


  • Joysticks
  • Gaming mice
  • Game pads
  • Motion sensing devices
• Scanners


  • Convert scanned data into a form the system unit can process
  • exp: flatbed,document,portable& 3D
• Card readers


  • Interpret encoded information stored on debit, credit and identification cards
  • exp: credit, entertaiment,bank&others
• Bar code readers


  • Contain photo-electric cells that scan or read bar codes or the zebra striped marks printed on product containers
• Bar code readers


  • Wand readers
  • Hand-held readers
  • UPCs and MaxiCode readers
• RFID readers


  • Read information on RFID tags via radio waves
• RFID tracking


  • Tracking runners in a marathon
  • Tracking location of people and items
  • Checking lift tickets
  • Managing inventory
  • Gauging vehicle tire conditions
  • Checking out library books
  • Providing access to rooms/buildings
  • Managing purchases
  • Tracking payment on tollways
• Character and mark recognition readers


  • Recognize special characters and marks
• Character and mark recognition readers


  • Magnetic-ink character recognition (MICR)
  • Optical-character recognition (OCR)
  • Optical-mark recognition (OMR)
• NFC reader


  • Uses close-range radio signals to communicate between two NFC-equipped devices
• NFC applications


  • Commerce
  • User identification
  • Security
• Image capturing devices


  • Create or capture original images
• Image capturing devices


  • Digital cameras
  • Web cams
• Audio-input devices


  • Voice recognition systems that allow users to operate computers and create documents using voice commands
• Voice recognition systems


  • Siri
  • Cortana
  • Google Now
• Biometric devices


  • Authenticate a person's identity by translating a personal characteristic into a digital code
  • uses: fingerprint reader, face recognition system, hand geometry system, voice verication system
• Output


  Processed data or information
• Types of output


  • Text
  • Graphics/photos
  • Audio & video
• Output devices


  • Monitors
  • Printers
  • Audio-output devices
• Monitors


  • Present visual images of text and graphics
  • Soft copy output
• Monitor features


  • Clarity
  • Resolution/pixels
  • Dot pitch
  • Contrast ratios
  • Size
  • Aspect ratio
• Monitor types


  • Flat-panel
  • Liquid Crystal Display (LCD)
  • Light Emitting Diode (LED)
  • Organic Light Emitting Diode (OLED)
  • Curved
• 1. book readers


  • Dedicated mobile devices for storing and displaying e-books
  • Use e-ink technology
• 1. book readers


  • Kindle
  • Nook
• Other monitor types


  • Digital/interactive whiteboards
  • Ultra High-definition television (UHDTV)
  • Digital projectors
• Printers


  • Translate information processed by the system unit
  • Produce text and graphics on a physical medium
  • Hard copy output
• Printer features


  • Resolution
  • Color
  • Speed
  • Memory
  • Duplex printing
• Printer types


  • Impact
  • Nonimpact
• Ink-jet printers


  • Form characters and graphics by spraying tiny drops of liquid ink onto paper
  • Can be color or black-and-white
  • Higher dpi produces higher quality output
  • Reliable, quiet and inexpensive
• Projector


  Projects the images from a traditional monitor onto a screen or wall
• Printers


  • Translates information that has been processed by the system unit
  • Produces text and graphics on a physical medium
  • Output referred to as hard copy
• Printer features


  • Resolution
  • Color
  • Speed
  • Memory
  • Duplex printing