This invention relates to a keyboard with multi-function keys are installed nearby the space bar to make it very convenient to use. The wafer handling chamber is continuously purged with inert gas. When the new component size exceeds that of available blocks of the first and second memory areas, the upgrade client rewrites the first memory area to eliminate unused memory blocks, reapportions the first and second memory areas, writes the new component to the second memory area, and updates a vector table.