This was-- embarrassingly-- news to me. I tried it immediately and had a look at the Finder's dictionary. I opened the dictionary and clicked the middle button and was immediately confused.
Confusion Number 1: At the far left there are TWO items that say "[c] Application." One has a triangle pointing to the right and the other doesn't. Clicking these two "[c] Application" things shows entirely different stuff. I would have expected only one "[c] Application."
Confusion Number 2: When I click the "[c] Application" with the triangle, I see a whole bunch of other things. Some of them have triangles indicating that they contain other things. That looks handy. But, if I click on "Folder>" it shows me ANOTHER list of things… with another "Folder>"… and if I click THAT… (repeat forever).
I wonder how deeply I could have burrowed. I gave up after ten levels.
Am I misunderstanding this? It looks like a big mess that somehow got through QA. Maybe it's just "a Finder thing." Wouldn't be the first, would it.
I'm using 10.8.5 by the way.