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Discovering Computers

Discovering Computers. Input. Input Device. Hardware that allows users to enter data or instructions into a computer Keyboards Pointing Devices Scanners and Reading Devices Audio Input Devices Picture/Video Input Devices Biometric Input Devices. Keyboard.

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Discovering Computers

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  1. Discovering Computers Input

  2. Input Device Hardware that allows users to enter data or instructions into a computer • Keyboards • Pointing Devices • Scanners and Reading Devices • Audio Input Devices • Picture/Video Input Devices • Biometric Input Devices

  3. Keyboard Contains keys user press to enter data • Types of Keys • Function • Number Pad • Arrangement of Keys • Ergonomics • QWERTY vs Dvorak • Wired vs Cordless Keyboards • Portable Keyboards • Keyboard Monitoring Software

  4. Pointing Devices Allow user to control a pointer on the screen • Mouse • Trackball • TouchPad • Pointing Stick • Joystick and Wheel • Stylus and Pen

  5. Audio Input The process of entering any sound into the computer such as speech, music, and sound effects • Microphones • Tape Players • CD/DVD players • Radios • Electronic Keyboards

  6. Voice Input Example of Audio Input: Entering data by speaking in a microphone • Voice Recognition (Speech Recognition) • Recognize vocabulary of pre-programmed words • Automated Telephone System at Bank • Dictate memos into word processing program • Speaker Dependent • Train computer by repeating vocabulary • Speaker Independent • Built-in set of words

  7. Input for PDA, Tablet PCs, Smart Phones • PDAs • Stylus • On-screen keyboard • Handwriting recognition software • Portable keyboard • Digital camera • Tablet PCs • Digital pen • Handwriting recognition software • Docking station • Smart Phones • SMS – short message service (Text Messages) • MMS – multimedia message service (pictures, videos) • Digital camera

  8. Video Input • PC Video Camera • Add live images to instant messages • Broadcast live images over the internet • Make video telephone calls • Web Cam • Video camera that displays its output on a Web page • Weather or Traffic information • Employees at work • Home Surveillance

  9. Scanners and Reading Devices • Light-sensing device that translates printed text and graphics into a form the computer understands • Types • Flatbed • Pen or Handheld • Sheet Fed • Drum • Optical Character Recognition • Converts scanned text documents into a text file that can be edited with a word processing program

  10. Optical Readers • Optical Characters • Turnaround documents – return to company that creates and sends it (phone bill) • Optical Marks • Fill-in circles on tests, questionnaires, answer sheet • Bar Code • Vertical lines and spaces of different widths • Retail Stores and Supermarkets • Universal Product Code (UPC) • United States Postal Service • POSTNET

  11. Magnetic Ink Character Recognition • MICR • Check Processing • Bank Routing Number • Customer Account Number • Check Number • Check Amount (added after check is cashed)

  12. Terminals • Dumb vs Smart • Does it have a processor? • Can it perform independently? • Special Purpose Terminals (Industry Specific) • Point of Sale • Location in a retail or grocery store where customers pay for goods. • ATM (Automated Teller Machines • Smart Display • Thin desktop monitor that detaches from the computer, wireless touch screen, remotely access computer

  13. Biometric Input • Translates personal characteristic into digital code • Fingerprint Scanner • Grade School – alternative to lunch money • Business – restrict access to computer • Law Enforcement • Face Recognition • Casino • Super Bowl Ticket Buyers (known criminals) • Secure Rooms • Hand Geometry System • UGA meal cards • Voice Recognition • Iris Recognition

  14. Input Devices for Physically Challenged • Voice Recognition • Keyguard – allows users to rest hands on keyboard • Keyboards with larger keys • On-screen keyboards • Trackball attached to wheelchair • Head-mounted pointer

  15. Web Resources • Take Online Quiz over scanners, terminals, biometric devices and input for the physically challenged users. • http://scsite.com/dc2005/quiz • Chapter 5: Objectives 9-12 • View Live Web Cam • Search Online: “Web cam” “Macon” “Weather” • www.13WMAZ.com • What are the prices of some biometric devices?

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