资料来源 : Free On-Line Dictionary of Computing

pizza box
     
        [Sun] The largish thin box housing the electronics in
        (especially {Sun}) desktop {workstation}s, 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.
     
        [{Jargon File}]