Digital Literacy

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Digital Literacy

  1. 1. Digital Literacy
  2. 2. Computers through the ages <ul><li>The Internet in 1969 </li></ul><ul><li>Digital Newspapers in 1981 </li></ul>
  3. 3. The Computer <ul><li>An electronic machine that stores information and instructions, performs calculations, and organizes data </li></ul>
  4. 4. The Computer System Data People Software Hardware
  5. 5. Computer Components Input Devices for entering data into a computer Processing (CPU) A complex procedure by which a computer transforms raw data into useful information Memory A collection of chips on the motherboard or a circuit board where all computer processing or program instructions are stored while in use Storage The portion of the computer that holds data or programs while they are not being used. Output Devices for transferring data that has been processed into information to the user
  6. 6. Computer Systems Environments <ul><li>Stand alone </li></ul><ul><ul><li>A computer is not attached to any other computer </li></ul></ul><ul><li>LAN (local area network) </li></ul><ul><ul><li>A system of computers located relatively near to one another and connected by a wire or wireless link </li></ul></ul><ul><li>WAN (wide area network) </li></ul><ul><ul><li>A computer network that spans a wide area </li></ul></ul>
  7. 7. Networks <ul><li>A network is a group of two or more computers linked together. </li></ul><ul><li>Allows computers to: </li></ul><ul><ul><li>Communicate </li></ul></ul><ul><ul><li>Exchange information </li></ul></ul><ul><ul><li>Share resources </li></ul></ul>
  8. 8. Advantages of Networks <ul><li>Simultaneous Access </li></ul><ul><ul><li>Users can share data/files and programs </li></ul></ul><ul><li>Shared Peripheral Devices </li></ul><ul><ul><li>Users can share printers, scanners and other devices </li></ul></ul><ul><li>Personal Communication </li></ul><ul><ul><li>Users can communicate using email, chats and videoconferencing </li></ul></ul><ul><li>Easier Backup </li></ul><ul><ul><li>Administrators can backup all material on shared drive </li></ul></ul>
  9. 9. Disadvantages <ul><li>Technical Expertise </li></ul><ul><ul><li>Most networks require specialized skills to set-up and maintain </li></ul></ul><ul><li>Computers are vulnerable to attacks </li></ul><ul><ul><li>Hackers, viruses, and other malicious software can infiltrate your computer </li></ul></ul><ul><li>Expensive </li></ul><ul><ul><li>A network requires specialized equipment and connections </li></ul></ul>
  10. 10. Software <ul><li>Operating System </li></ul><ul><ul><li>The master control program that provides an interface for the user to: </li></ul></ul><ul><ul><ul><li>communicate with the computer </li></ul></ul></ul><ul><ul><ul><li>manage devices </li></ul></ul></ul><ul><ul><ul><li>maintain file systems </li></ul></ul></ul><ul><ul><ul><li>support application programs </li></ul></ul></ul>
  11. 11. Software <ul><li>Application Software </li></ul><ul><ul><li>Any computer program used to create or process data </li></ul></ul><ul><ul><ul><li>Word processing </li></ul></ul></ul><ul><ul><ul><li>Spreadsheets </li></ul></ul></ul><ul><ul><ul><li>Presentations </li></ul></ul></ul><ul><ul><ul><li>Desktop publishing </li></ul></ul></ul><ul><ul><ul><li>Databases </li></ul></ul></ul>

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