Grid GridCase

GridCase is a line of rugged tablets and laptops by Grid Systems Corporation released as successor of GRiD Compass line.
Notable models.
GridCase 1535EXP.
Grid GridCase 1535EXP is a rugged laptop with a 80386 CPU, an optional 80387 floating point processor and up to 8 Mbyte of DRAM designed for NASA to be used in space. It was first flown into space in December 1992 on the 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.