Type: External (6.0 and later)
FASTHELP [command] [command] /?
Purpose: Displays a list of DOS commands with a brief explanation of each (new with DOS Version 6).
The information provided in MS-DOS Help is more inclusive than that provided by FASTHELP, but if you just need a brief reminder, FASTHELP may be the best choice.
To display help information for the DIR command, enter fasthelp dir