find the "seven" differences

[AVL]

What I find really amusing is how all the HP-50G worshippers tend to forget how bad the HP-50G was back in the days of it's launch (when it still was called the HP-49G+). It crashed literally every ten minutes, the keyboard failed to respond to every third keystroke, and the CAS was a joke compared to that of the TI-89 (Derive!). It took a new hardware with new colors and new keyboard internals, a name change and countless firmware upgrades to correct most of the bugs.

Not that it was a difficult goal to achieve, but the HP Prime is doing much better in that respect. The hardware and build quality were much better from day one (that was easy) and the firmware became more stable in less time compared to that of the 49G+/50G...