My apologies in advance, for NeXTs are not yet classic, depending on how far one is willing to bend the 10-year limit...but soon, and this is a reasonably good time to collect them... NeXT's first (68030) computer had a processor box which was basically cube-shaped. The front had an opening for an optical drive (or two), there were vertical slots two on each side on the back, and there was a sort of small radiator-fin pattern around the sides and top. Also small feet on the bottom. The exterior finish was black except for connectors and markings (serial number, etc.) on the back and plain metal on the bottom. The processor box,display, keyboard, and mouse were finished in matching black. Very unique. Sounds sinister, but it actually is very nice to work in front of. Of the four slots on the back, one was full of the processor board, and the other three were generally empty. A NeXTDimension Card (color display driver and other stuff) could occupy one of the other three slots. It was possible to put seperate 030 or 040 cards into the empty slots with some modifications. These became standalone computers - the only communications to them were through the ethernet or serial ports on the back, and in fact they had to be set up to net-boot through the ethernet port. I'm not aware of any other boards designed to fit in the empty slots. Later NeXTs using 68040's at 25 MHz and at 33 MHz (Turbo) came in two styles: the Cube case, virtually undistinguishable from the older cube case, and a "Pizza box" case which went under the monitor. The "Pizza Boxes" were referred to as "NeXT Stations" (possibly with modifiers "Color" and/or "Turbo") rather than "NeXT Cubes" or "NeXT Computers". - Mark