use Data::Dumper; 
while (<DATA>) {
    chomp;
    @F = split /\t/; # <== place proper delimiter or regex
    $devices{$F[4]}{$F[-1]}++;
}
$Data::Dumper::Sortkeys = 1;
print Dumper \%devices;

# accessing
for $type (sort keys %devices) {
    for $size (sort {$a <=> $b} keys %{$devices{$type}}) {
        print "$type $size $devices{$type}{$size} \n";
    }
}

[download]
- J

In reply to Re^3: Counting devices types, device sizes and number of devices. by jaimon
in thread Counting devices types, device sizes and number of devices. by perl514

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