1 DOWN
 This command is provided to move down the directory hierarchy.

 Format:

      DOWN   [subdirectory]

 Where 'subdirectory' specifies the subdirectory  to  set  the
 default  to.   This may be multiple subdirectories if desired
 (eg. DOWN   WORK.PROJECT.UTIL ).  
 
 If no parameter is specified  then the last value  placed  on
 the  stack by the 'UP' command is  used and then removed from
 the stack. 

 If a number is specified then the number of levels  specified
 will be taken from the stack and used.  Range of 0-9 is valid
 Anything greater than 9 is assumed to be a numeric directory.

 If the subdirectory specified is  invalid  then  the  default
 will not be set and no error issued.
