Our MB IPC3S MicroBox™ PC Systems are perfect for small spaces, wall-mount, and embedded applications. They come with no power supply, but five screw terminals are set up for +/- 5VDC, +/-12VCD, and ground. There is vented cooling but no fan. There are no drive bays, but there are connectors for FDD, HDD, and parallel port.
You can choose among three 3-slot ISA or PISA passive backplanes. Look for single-board computers in the "Industrial Computers" section of this website. For other useful boards, see "Data Acquisition & Control Systems."