one-true-awk/testdir/p.43

*9a7741deSElliott HughesBEGIN	{ FS = "\t" }
*9a7741deSElliott Hughes	{ area[$4] += $2 }
*9a7741deSElliott HughesEND	{ for (name in area)
*9a7741deSElliott Hughes		print name ":" area[name] }