CONFIG.SYS

File Format
Name	CONFIG.SYS
Ontology	Electronic File Formats Configuration files DOS configuration files CONFIG.SYS
Extension(s)	.sys

Configuration file describing how MS-DOS should start.

Allows the user to load drivers. Also allows programs to be loaded into highmem.

Links

• The Dos for Dummies book goes into some detail on this
• https://support.microsoft.com/en-gb/kb/232557