Using an OO Module use Cards; my $card = Cards->new( suit => 'H', name => 'Q' ); $card->set_face("back"); $card->set_suit("D"); $card->print; foreach $i (2..9) { push @deck, Cards->new ( suit => 'D', name => $i); } foreach (@deck) { $_->print; } $card is a reference to something Inside the module it can be a ref-to-array, a ref-to-hash, a ref-to-scalar, etc. The user of the module doesn't know, and shouldn't care. (encapsulation) unless they're extending the module themselves Each element of @deck is a different instance. Cards can be based on another OO module (inheritance) inherit methods and/or attributes (data) which are accessed via methods.