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Evolution of the Operating Systems

  • Batch Systems

    Batch Systems

    Date from the earliest computers, when they relied on stacks of
    punched cards or reels of magnetic tape for input.
  • Embedded systems

    Embedded systems

    Are computers placed inside other products to add features
    and capabilities.
  • Hybrid systems

    Hybrid systems

    Are a combination of batch and interactive. They appear to be
    interactive because individual users can access the system and get fast responses, but such a system actually accepts and runs batch programs in the background when the interactive load is light.
  • Interactive systems

    Interactive systems

    Give a faster turnaround than batch systems but are slower than
    the real-time systems we talk about next. They were introduced to satisfy the
    demands of users who needed fast turnaround when debugging their programs.