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1.2.1 system software (Virtual machines (servers running on top of servers…

- - - - simple que - in the order at which it arrives
      - means long tasks hold up short tasks
    - - items are added to que in order
      - time is needed to be known in advanced
      - each program runs until completion
      - means big jobs may never be completed
    - - each provess gets a fixed amount of time
      - fair but not efficent
      - once time happens it goes back to the end of the que
    - - job times need to be knoen
      - jobs will intrupt if they are shroter
    - - many ques with different requriments
- - - - what process to execute next
      - interrupts
    - - paging / segmentation
      - virtual memory
    - - device drivers
    - - allow files to be interacted with
      - contains utility programs
    - - shared drives
      - requests for acess
      - log in
      - printers
    - - GUI
      - WIMP
      - menu
      - command line
    - - runes
      - installation