(SYStem file) A file extension commonly used for DOS/Windows drivers, such as ANSI.SYS, HIMEM.SYS and KEYBOARD.SYS. See system file. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction ...
The default setting for Windows is to not display a file's extension, which is the last period in a file name followed by 2 or 3 letters. Therefore, when viewing files in Windows you would only see ...