The greatest HP breakthrough Scientific calcs

[KeithB]

I don't think the Prime is that much of a breakthrough. It is an amazing calculator, but it is a pretty obvious evolution from what was before. The only thing it really adds is a touchscreen, and phones had made those ubiquitous and even were used by the various emulators.

I agree that the 41 was groundbreaking.

Though the PC killed them, the HP-75 and -71 were also ahead of the curve, and actually useful as small controllers as well as calculators. (Well, the 71 was)