print $os->{arch}, " " if exists $os->{arch};
print $os->{major_version} if exists $os->{major_version};
print ".", $os->{minor_version} if exists $os->{minor_version};
print $os->{arch}, " " if exists $os->{arch};
print $os->{major_version} if exists $os->{major_version};
print ".", $os->{minor_version} if exists $os->{minor_version};