A rugged laptop with 80386 CPU and optional 80387 floating point processor and up to 8 Mbyte DRAM designed for NASA to be used in space. First flown December 1992 on STS-53 for use of the HERCULES geolocation device.The power input is 100-240 V AC 50/60/400 Hz, 80 W. The 400 Hz utility frequency is common on airplanes and submarines.