Logical_names

   Using higher-level names in place of device and file names.
   (Also see Physical_devices)

 ASSIGN            Equates a logical name to an equivalence string.
 CREATE/NAME_TABLE Creates a logical name table.
 DEASSIGN          Deletes a logical name.
 DEFINE            Equates a logical name to an equivalence string.
 SHOW LOGICAL      Displays logical names and their equivalencies.
 SHOW TRANSLATION  Displays a logical name and its first equivalence.

 Type ? to display the list of HINTS.
 Type LOGICAL_NAMES to redisplay this particular hint.  
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