The GridCase was about the same size and featured the same robust magnesium case as Compass model, but Grid forwent the Compass's expensive and power-hungry electroluminescent display and bubble memory. The GridCase series was composed of 4 models. The GridCase I featured a bottom-of-the-range LCD display, the GridCase II had an enhanced LCD "that more than one person can read" Grid said, the GridCase III offered a high-contrast gas-plasma display, and the GridCase IV which used a full size yellow electoluminescent screen that was also offered on the high end earlier Grid Compass Computers.