use Storable;

store [ \%a, \%b, \%c] , 'file';
# or 
store { a =>  \%a, b => \%b, c => \%c} , 'file';


my $arrayref = retrieve('file'); 
my $a = $arrayref->[0];
# or
my $hashref = retrieve('file'); 
my $a = $hashref->{a};