chapter 5 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Chapter 5 PowerPoint Presentation
Download Presentation
Chapter 5

Loading in 2 Seconds...

play fullscreen
1 / 32

Chapter 5 - PowerPoint PPT Presentation


  • 329 Views
  • Uploaded on

Chapter 5 Input and Output: The User Connection Input vs. Output Users use input devices to provide data to the computer Output devices provide information to the user Input devices Keyboard Function keys Main keyboard Shift, control, Caps lock, tab Numeric keys and status lights

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Chapter 5' - Gabriel


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
chapter 5

Chapter 5

Input and Output: The User Connection

input vs output
Input vs. Output
  • Users use input devices to provide data to the computer
  • Output devices provide information to the user
input devices
Input devices
  • Keyboard
    • Function keys
    • Main keyboard
      • Shift, control, Caps lock, tab
    • Numeric keys and status lights
      • Num lock
    • Num lock, Insert, and Caps lock are “toggle” keys
input devices pointing device
Input Devices–Pointing Device
  • Pointer
    • Arrow
  • Insertion point or cursor
    • Vertical bar
input devices pointing device5
Input Devices–Pointing Device
  • Mouse
    • Mechanical mouse
    • Optical mouse
    • Wireless mouse
input devices pointing device9
Input Devices–Pointing Device
  • Joystick
    • Used often for games
    • Can be used instead of a mouse
input devices pointing device10
Input Devices–Pointing Device
  • Graphics tablet
    • Stylus
    • Puck
input devices pointing device11
Input Devices–Pointing Device
  • Touch screens
  • Used in kiosks, a self-contained station
  • Kiosks are found in libraries, museums, airports, and shopping malls
magnetic ink character recognition micr
Magnetic-Ink Character Recognition (MICR)
  • A type of source data automation
  • Used most by the banking industry
  • MICR numbers printed on checks
scanners
SCANNERS
  • Use laser light
  • 3 types
    • Flatbed scanner
    • Sheetfed scanner
    • Handheld scanner
scanners extra
SCANNERS (Extra)
  • Flatbed scanner
    • Scans one sheet at a time
    • Can be used on books
    • Can scan 3-D objects
    • Take a lot of desk space
scanners extra16
SCANNERS (Extra)
  • Sheetfed scanner
    • Scans one sheet at a time
    • Cannot scan bound material
    • Take less space than flatbed
scanners extra17
SCANNERS (Extra)
  • Handheld scanner
    • Least expensive
    • Least accurate
    • May require several passes to get a complete page scanned in
optical recognition
Optical Recognition
  • Optical Mark Recognition (OMR)
    • For “reading” marks, lines, filled circles, etc
  • Optical Character Recognition (OCR)
    • Analyzes an image, converts it into characters
    • Can recognize handwritten characters if done in block printing
optical recognition19
Optical Recognition
  • Bar codes
    • Universal Product Code (UPC) is one standard
    • Other codes exist
voice input
Voice Input
  • Speech recognition
  • Speaker-dependent
    • “trained” for a specific person’s voice
  • Speaker-independent
    • Recognize any voice
    • Limited vocabulary
input device
Input Device
  • Digital camera
    • No film
    • Uses memory chips, disks, or memory sticks
output devices
Output Devices
  • CRT monitor
    • Cathode Ray Tube
    • Raster scanning
    • 3 colors of light: red, green, and blue produce all the colors
output devices23
Output Devices
  • CRT monitor quality
    • Refresh rate (scan rate) = number of
    • Interlaced vs. non-interlaced
    • Resolution
      • More pixels means higher resolution
    • Dot pitch
    • Size of monitor
output devices24
Output Devices
  • Flat Panel screen
    • Liquid crystal display (LCD)
    • Active matrix (TFT)
    • Passive matrix
computer output
Computer Output
  • Monitor
    • Softcopy
  • Printer
    • Hardcopy
    • Portrait vs. landscape
    • Resolution in dpi (dots per inch)
computer output26
Computer Output
  • Voice output
    • Speech synthesis
    • Synthesis by analysis
    • Synthesis by rule
  • Music and sound output
    • MIDI
computer output27
Computer Output
  • Graphics cards – provide output to a monitor
  • Have memory chips on the card
  • Graphics standards
    • SVGA - Super Video Graphics Array
    • XGA – Extended Graphics Array
  • XGA supports more simultaneous colors than SVGA
output devices28
Output Devices
  • Dot-matrix printer
    • Impact
    • Pins striking a ribbon against paper
    • Used for multiple part forms
output devices29
Output devices
  • Laser printer
    • Non-impact
    • Light beam helps transfer images to paper
    • High quality
    • Uses toner and technology similar to a photocopier
output devices30
Output Devices
  • Ink-jet printer
    • Non-impact
    • Spray ink onto paper
    • Good quality
    • Most can print in color
computer terminal
Computer Terminal
  • Dumb terminal
    • Keyboard and monitor
    • No processing capability
  • Intelligent terminal
    • Keyboard, monitor, memory
    • Some processing capability
  • Both dumb and intelligent terminals must be connected to a “host” or server computer
point of sale terminal pos
Point-of-sale terminal (POS)
  • Specialized input and output devices
  • The “cash register” at a supermarket is a POS
  • Input through keyboard, scale, plus one or more scanners
  • Output to one or more display devices plus receipt printer