Oracle forms application that CityBank used. The confusing interface might have been ok when written. But then the developers and designers involved with this app left, new faces in, who had no idea what these fields do.
And CityBank lost $500 million entering wrong info in the wrong field which got approved by cascading higher authorities in the bank, as no one had full knowledge on the fields. And a judge said "no, you can't get the money back from people you wrongly sent them."
Technology decay.
