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                interface
[MAIN Program] <---------> [DATA Module] <---------> data
                        (abstraction layer)

get_data_as_array()
set_data_from_array()

MAIN - to tie it all together
DATA - to handle data storage and retreival
MUNGE - to do fancy stuff to the data
USER_INTERFACE - to make it pretty
WIDGET - to do all the stuff we forgot elsewhere :-)