We need a small fanless PC in a case that has no ventilation holes. This PC is to be used in industry. 1 Ghz processor, 512K Ram, 4 GB solid state hard drive or bootable compact flash, Windows XP. We do not want an optical drive installed. On the back of the case we need the following ports: VGA, Keyboard, Mouse, 4 x USB, 1 x RS-232 DB9, Ethernet. On the front of the case we would prefer to have no ports at all but one or two USB ports on the front and a power switch would be acceptable. We buy about 200 of these per year.