Explanation of the HELP command. It is EXTERNAL.

This command provides more on-line help with the 
MS-DOS 5.0 commands.

Example:
       Suppose you don't know how to use the DISKCOPY command.
       Then you have two choices: (1) Look for this tutor and
       read the explanation here or (2) you could use MS-DOS's
       on-line help program like this:
           help diskcopy