17. Disk Operating System, DOS

• The first OS used by IBM computers/compatibles

• Where DOS can still be found:

  • Specialized systems using older applications

  • On troubleshooting floppy disks or CDs

  • DOS is the OS of Windows 3.x:

    • Windows 3.x provided a graphical interface

    • Underlying OS functions were performed by DOS

  • Windows 9x/Me uses DOS in the underlying OS

• Windows XP/2000 run DOS emulation programs