Computers: Tools for an Information Age - PowerPoint PPT Presentation

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Computers: Tools for an Information Age

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  1. Computers:Tools for an Information Age Chapter 5 Input and Output: The User Connection Copyright © 2003 by Prentice Hall

  2. Objectives • Describe the user relationship with computer input and output • Explain how data is input into a computer system and differentiate among various input equipment • Describe how a monitor works and the characteristics that determine quality • List and describe the different methods of computer output Copyright © 2003 by Prentice Hall

  3. Objectives • Differentiate among different kinds of printers • Explain the function of a computer terminal and describe the types of terminals • Describe the ethical considerations involved in handling computer data Copyright © 2003 by Prentice Hall

  4. How Users See Input and Output • Users submit data (input) to the computer to get processed information (output) • Output can be instant reaction to input • Also can be separated by time, distance, or both Copyright © 2003 by Prentice Hall

  5. Input: Getting Data from the User to the Computer • Keyboard • Pointing devices • Source data automation Copyright © 2003 by Prentice Hall

  6. Output: Information for the User • Computer screens • Printers • Voice output • Music output • Microform Copyright © 2003 by Prentice Hall

  7. Terminals • Combine input and output capabilities • Dumb terminal • Keyboard for input and monitor for output • No processing capability • Intelligent terminal • Has limited memory and a processor • Point-of-sale (POS) terminal • Captures retail sales data when transaction takes place Copyright © 2003 by Prentice Hall

  8. Computer Graphics • Business graphics • Video graphics • Computer-aided design/computer-aided manufacturing (CAD/CAM) Copyright © 2003 by Prentice Hall

  9. Ethics and Data • Once data is in computer, there are many ways it can be used • Ethical issues to ponder • Is it ethical to use a computer to alter photographs? • Is it ethical to erase e-mail messages that may be of interest to a party in a lawsuit? • Is it ethical to use someone else’s data for your purposes? Copyright © 2003 by Prentice Hall