Early Shuttle missions carried a laptop computer made by Grid Systems, Inc. The Grid was chosen because of its rugged metal case and its use of a solid state memory instead of a rotating disk. Software developed for the Grid included a graphic that displayed the Orbiter's position in space at any given time, relative to the Earth and to the line of daylight/darkness.
This is an unflown model identical to those flown on early Shuttle missions.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.