What is CONFIG.SYS ?

What is CONFIG.SYS? Device Drivers Loading Computer Commands
DOS CONFIG.SYS File
     A special text file that controls certain aspects of operating-system behavior in MS-DOS and OS/2. Commands in the CONFIG.SYS file enable or disable system features, set limits on resources (for example, the maximum number of open files), and extend the operating system by loading device drivers that control hardware specific to an individual computer system.


The following is an example of
what the config.sys may look like:

DEVICE=C:\WINDOWS\HIMEM.SYS
DOS=HIGH,UMB
DEVICE=C:\WINDOWS\EMM386.EXE NOEMS
FILES=30
STACKS=0,0
BUFFERS=20
DEVICEHIGH=C:\WINDOWS\COMMAND\ANSI.SYS
DEVICEHIGH=C:\MTMCDAI.SYS /D:123


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What is CONFIG.SYS? Device Drivers Loading Computer Commands