[Sun] The largish thin box housing the electronics in
(especially
Sun) desktop workstations, so named because of
its size and shape and the dimpled pattern that looks like air
holes.
Two megabyte single-platter removable disk packs used to be
called pizzas, and the huge drive they were stuck into was
referred to as a pizza oven. It's an index of progress that
in the old days just the disk was pizza-sized, while now the
entire computer is.