The cray x-mp and y-mp supercomputers of the 1980s, reserved for simulating nuclear chain reactions or weather or other high compute tasks, had a capacity well

The cray x-mp and y-mp supercomputers of the 1980s, reserved for simulating nuclear chain reactions or weather or other high compute tasks, had a capacity well below a solid contemporary smart phone. Only in the late 1990s 32GB of ram became available. https://en.m.wikipedia.org/wiki/Cray_X-MP https://en.m.wikipedia.org/wiki/Cray_X-MP https://en.m.wikipedia.org/wiki/Cray_Y-MP https://en.m.wikipedia.org/wiki/Cray_Y-MP For a real main frame in your pocket have a look at the Hercules mainframe emulator. https://en.m.wikipedia.org/wiki/Hercules_(emulator) https://en.m.wikipedia.org/wiki/Hercules_(emulator)