And this is all before integrated circuits, so the circuits are still very large, consisting of many circuits on boards mounted on a backplane. https://en.wiki

And this is all before integrated circuits, so the circuits are still very large, consisting of many circuits on boards mounted on a backplane. https://en.wikipedia.org/wiki/IBM_System/360#Basic_hardware_components https://en.wikipedia.org/wiki/IBM_System/360#Basic_hardware_... https://en.wikipedia.org/wiki/Solid_Logic_Technology https://en.wikipedia.org/wiki/Solid_Logic_Technology