Nitpick: "[The System/360] was the worlds first real programmable mainframe computer, opening up the notion that computers could be reprogrammed to suit new pr

Nitpick: "[The System/360] was the worlds first real programmable mainframe computer, opening up the notion that computers could be reprogrammed to suit new problems instead of being replaced by newer models." The S/360 was by no means the first programmable computer. Rather, it was the first computer product line where all systems were compatible with each other, and where future models would all retain backwards compatibility. The selling point was that you would not have to rewrite your code (or make significant changes) if you wanted to move to a larger system.