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A text file containing special systemconfiguration commands, found in the root directory on anMS-DOS computer, typically on drive C (the hard disk). Itis read by MS-DOS at boot time, after the setup has been readfrom CMOS RAM and before running AUTOEXEC.BAT. It can bemodified by the user.Some example commands which CONFIG.SYS might contain are:DEVICE=C:\DOS\HIMEM.SYS /testmem:offLoad the extended memory manager.DEVICE=C:\DOS\EMM386.EXE RAMLoad the expanded memory manager.BUFFERS=10,0Specify memory for disk buffers.FILES=70Set the number of files that can be open at once.DOS=UMBDOS is located in UppeMemoryBlock.LASTDRIVE=ZDisk drives are A: to Z:.FCBS=16,0Set the number of file control blocks.DEVICEHIGH /L:1,12048 =C:\DOS\SETVER.EXEReport the DOS version to older programs.DOS=HIGHDOS should maintain a link to UMB.COUNTRY=358,437 C:\DOS\COUNTRY.SYSSet the country code for some programs.STACKS=9,256Set dynamic stacks for hardware control.SHELL=C:\DOS\COMMAND.COM C:\DOS\ /E:1024 /pSet the location of the command interpreter.