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Introduction To Computers

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									Discovering Computers
  Chapter 1: Introduction to
         Computers
Computer Literacy

     Having knowledge and
 understanding of computers and
           their uses.
A World of Computers
   Computers are everywhere: at work, at
    school and at home
       Communication
            Text Messages, Pictures, Diagrams, Music, Videos
       Instant Access to Information
            National News, weather reports, maps, credit reports,
             educational material
       Manage Daily Activities
            Balance checkbook, Letters, Presentations, navigation
             systems
       Leisure Time Activities
            Play games, listen to music, read books, plan vacations
What is a COMPUTER?
   An electronic device, operating under
    the control of instructions stored in its
    own memory unit, that can accept data,
    manipulate data according to specific
    rules, produce information from the
    processing, and store the results for
    future use.
Hardware in a Computing Environment
   Input Devices
   Output Devices
   System Unit
   Storage Devices
       storage media
   Communication
    Devices
Advantages of Using A Computer
 Speed
 Reliability
 Consistency
 Storage
 Communications
Disadvantages of computer
 Violation of Privacy
 Impact on Labor Force
 Health Risk
 Impact on Environment
Network
   Collection of
    computers and
    devices connected
    together
   Share resources such
    as hardware,
    software, data
   Server/Client
The Internet
   World’s largest Network
       Millions of computers
       Over 360 million users
       World wide
   Reasons for using
       Sending messages (e-
        mail)
       Accessing information
       Shopping
       Meeting or conversing
       Entertainment
            Games
            Magazines
            Vacation planning guides
The World Wide Web
   One segment of the
    Internet
   Contains billions of
    documents
       Web pages
   Web site
       Collection of related
        web pages
   Viewed using Web
    Browser
       IE –Netscape
Computer Software
 Software/program – series of
  instructions that tell computer what to do
 GUI – Graphics User Interface
 System Software – control operations of
  computer and devices
       operating system – coordinates activities among
        computer hardware
       utility programs – maintain devices and
        programs
   Application Software – makes user more
    productive or assists with personal tasks
Categories of Computers
   Embedded Computers
       Consumer Electronics, Automobiles, Office Machines,
        Home Automation
   Personal Computers
       Desktop
       Mobile Computers :
            Notebook/laptop
            Tablet PC (digital pen)
       Mobile Devices
            handheld – industry-specific
            PDAs -organizers
            smart phones –internet enabled phone with PDA
             capabilities
            smart watches – internet enabled watch
       Game Consoles
            Nintendo’s Game Boy
            Sony’s Playstation
Categories of Computers (cont)
   Servers
       Controls resources on a network
       Centralized storage area
   Mainframes
        handles hundreds of thousands connected
        users simultaneously (DELTA)
   Supercomputer
        fastest most powerful (weather forecasting,
        nuclear energy research)
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Discovering Computers 2007
by Shelly Cashman and Vermatt
http://www.scsite.com/dc2007


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