       The Storable package brings you persistency for your perl
       data structures containing SCALAR, ARRAY, HASH or REF
       objects, i.e. anything that can be convenientely stored to
       disk and retrieved at a later time.

       It can be used in the regular procedural way by calling
       store with a reference to the object to store, and
       providing a file name. The routine returns undef for I/O
       problems or other internal error, a true value otherwise.
       Serious errors are propagated as a die exception.

       To retrieve data stored to disk, you use retrieve with a
       file name, and the objects stored into that file are
       recreated into memory for you, and a reference to the root
       object is returned. In case an I/O error occurred while
       reading, undef is returned instead. Other serious errors
       are propagated via die.
