RD

Deletes (removes) a directory.

Note: This command doesn't remove a directory unless it is 
empty. To delete a directory tree no matter it is empty or not, 
use DELTREE command. In Windows NT, DELTREE command doesn't 
exist. You should use RD command with switch "/S" to delete a 
directory tree.

For more information, please refer to MS-DOS Help or Windows NT 
command line command help.