While Windows has moved away from using Microsoft Disk Operating System as a base, versions of DOS still persist. Some programs refuse to run in modern versions of Windows and require a DOS emulator.

The Config.sys is the main configuration file used by OS/2, MS-DOS and other operating systems. Config.sys commands loads programs into the memory and sets ups the memory management of the system. The ...

(CONFIGure SYStem) A text file that contained commands to load drivers and establish settings in a DOS PC. Along with AUTOEXEC.BAT, it resided in the root folder. CONFIG.SYS was included in Windows ...