= P =
pizza box n.
[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-meg 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.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.