This is a color image of an NSC SDK multibus board against a white background. Light is coming from overhead. The board has several copper/gold color plated connectors on each side that connects to a main motherboard. The board has a copyright symbol and logo that reads "NSC 1981". There are several IC chips of different colors (white, black, gray, and red laid out on the board. Written on verso side in pencil is "SDK (Multibus)".