field artillery digital automatic computer, aka fadac, first prototype: 1959.

hm, somehow i have seen this picture before ... somewhere.

basic considerations: 6. Minimum physical size, weight, and power consumption (not to exceed 200 lb in weight and 500 w in power.)

The FADAC is a solid-state electronic digital computer. It is compact, portable, and rugged. It is approximately 24 x 14 x 34 inches in size and weighs about 200 pounds ... It should be capable of operating under field conditions, without major overhaul, for at least 2,500 hours. The solid-state components are expected to operate for at least 10,000 hours. (electronic computers within the ordnance corps)

Very very beautiful, archeology of the finest kind!
ECWTOC is in my bookmarks now.