chad box

n. A metal box about the size of a lunchbox (or in some models a large
wastebasket), for collecting the chad (sense 2) that accumulated in Iron Age
card punches. You had to open the covers of the card punch periodically and
empty the chad box. The bit bucket was notionally the equivalent device in
the CPU enclosure, which was typically across the room in another great
gray-and-blue box.

