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Com Lecture Presentation 1

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    Com Lecture Presentation 1 Com Lecture Presentation 1 Presentation Transcript

    • Essential Introduction to Computers
      Mr.Downing
      Computer Information Systems
    • What Is a Computer?
      A computer is an electronic device, operating under the control of instructions stored in its own memory, that can accept data (input), process the data according to specified rules (process), produce results (output), and store the results (storage) for future use
    • What makes a computer so powerful?
      SPEED A computer can do billions of actions per second
      RELIABILITY Failures are usually due to human error, one way or another
      STORAGE A computer can keep huge amounts of data and is easily organized
    • What Are the Components of a Computer?
      Input
      Memory
      Storage
      Processor
      Output
      Memory
      Storage
      Output
      Input
      Processor
      I need 3
      volunteers!
    • Information Processing Cycle (4 basic functions of a computer)
      Input
      Processing
      Output
      Storage
      Example: Report Card
    • Input Devices
      Any hardware component that allows you to enter data, programs, commands, and user responses into a computer
      Examples??
    • Processor
      Also called CPU (Central Processing Unit)
      Interprets and carries out the basic instructions that operate a computer
      2 parts
      Control unit interprets instructions
      Arithmetic/logic unit performs arithmetic and logical processes
    • Output Devices
      Output devices make the information resulting from processing available for use
      Output Device Examples??
    • Storage Devices
      Used to store instructions, data, and information when they are not being used in memory
      Floppy disk
      Hard disk
      CD/DVD (ROM, R, RW)
      Tape
      Flash drive
    • Memory
      Also called RAM (Random Access Memory)
      Temporarily stores instructions waiting to be executed by the processor, data needed by those instructions, and the results of processed data
      Kilobyte, megabyte, gigabyte
      Byte = 1 memory location ex. the letter A
    • System Unit
    • Computer Mobile Devices
      PDA (personal digital assistant)
      Notebook computer
      Smartphone
      Pocket PC
    • It’s Your Turn! Find a partner.
      Computers are everywhere. Watching TV, driving a car, using a charge card, ordering fast food, and typing a term paper all involve interactions with computers. Make a list of every computer you and your partner can recall that you encountered over the past week.
      Create a timeline of at least 10 milestones/major advances in computer technology.
      Who were some of the major contributors to computer technology (individuals, organizations, corporations)? List at least 4 and describe what they did.
      How have businesses and our personal lives been affected by computer technology?