This made me think of Alan Cooper's mental model vs. physical model concept. From a message board for photographers, talking about new features in MacOS X 10.3:

"I was at a demo of Panther just over a week ago and man did it ever have some cool things. The F10 and F9 buttons were used to get instant proof sheets on the screen of whatever was running on the machine whether it was numerous programs or 10 pictures in Photoshop."

Proof sheets. What a photo geek.