Remember when your library card had a little metal tab with numbers on it, and they'd put it on a little machine and insert the card from your book selection into a little muncher slot, and it would munch off the bottom side edge of the card a bit? I want one of those machines. I've been searching for years on ebay and in junk stores, and I can't even find out what they were called. Do you know what they are called & where I can find one? I don't know what I'll do with it. I just know I want one.