JOIN + Joining Drives via a Directory
     Joins a drive to a subdirectory of another drive. 
    VERSION
          PC-DOS 2.0+
	  MS-DOS equivalent: JOIN (3.0+)
    TYPE
          External 
    SYNTAX
	  [d:][path] JOIN sd: td:\directory
or
	  [d:][path] JOIN td:/D
    OPTIONS
	  [d:][path]	 Specifies the drive letter and path that
                         contain the JOIN command file.
	  sd:		 Specifies the source drive to be joined
                         to a directory on another drive.
	  td:\directory  Specifies the target directory you will
                         join a drive under.
          /D             Disconnects the join. You must specify 
                         the drive letter of the drive whose join 
                         you are deleting.
     JOIN is used to run programs that understand only floppy 
disks on a hard disk system.
    EXAMPLES
	  JOIN C: B:\HARDISK
makes files on drive C accessible by referencing them through the 
subdirectory named HARDISK on drive B.
	  JOIN
displays all currently existing JOINs.
    MESSAGES
	  Cannot JOIN to a network drive
The JOIN command will not join local and network drives.
	  Directory not empty
You have tried to use JOIN on a directory that is not empty. The 
directory must be empty. Reenter the command using an empty 
directory.
	  Invalid parameter
You have tried to use JOIN on the current directory. Reenter the 
directory path using a noncurrent directory.
	  Invalid drive specification
You have tried to refer to a joined drive. Disconnect the join 
using the /D parameter.
    UNDO
     Issue the command
	  JOIN d: /D
where d: is the drive letter of the drive whose join you wish to
delete. 
    NOTE
     The directory you specify cannot be the root directory (\). 
The directory being joined to must be empty. Do not use JOIN with 
ASSIGN or SUBST. Do not use BACKUP, RESTORE, FORMAT, DISKCOPY, or 
DISKCOMP while a JOIN is in effect.
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    SEE ALSO
          ASSIGN Command
          BACKUP Command
          BREAK Command
          COMMAND Command
          CTTY Command
          DISKCOMP Command
          DISKCOPY Command
          EXE2BIN Command
          FASTOPEN Command
          FORMAT Command
          RESTORE Command
          SUBST Command