Operating system and system software Operating Systems


Directory (or Folder): A user-created bundle of files and other directories (subdirectories)



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Directory (or Folder): A user-created bundle of files and other directories (subdirectories)

  • Directory Path: A sequence of directories within directories

  • Device drivers

  • Memory manager

    • Allocates space in main memory

    • May create the illusion that the machine has more memory than it actually does (virtual memory) by playing a “shell game” in which blocks of data (pages) are shifted back and forth between main memory and mass storage

  • Scheduler and dispatcher


    Evolution of Shared Computing


    • Batch processing

      • has been associated with mainframe computers since the earliest days of electronic computing in the 1950s

      • OLD SCHOOL

        • queue a project/program into the computer’s job queue, gives the results when done

      • but still used in billing, payroll, any administration

      • http://processanddata.com/batching-systems/





    Batch processing







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