In UI navigation jargon, bread crumbs are used to describe a trail of links back to the starting point. This is obviously a reference to Hansel and Gretel, where they use a literal trail of bread crumbs to mark their path back to their house. But if you remember, the bread crumbs were eaten by birds and so pretty terrible as a navigation aid. The stones or pebbles, which he had used on the previous days actually worked.
How and when did bread crumbs come to have the meaning it seems to?