Introduction and RPN calculator advice

[NicolaB]

I've sent an answer but i don't see it published.

The 50g is above what i consider too bulky to quickly slide in the pocket, car, and so on. I have more than one RPN calc on both the phone and the notebook, but i keep them just to substitute the integrated algebraic calc when i don't have a physical calculator at hand. I've tried to go "software" but i have to agree with most HP users that a proper physical keyboard makes you work better and faster.
The very useful comparison table left me a bit puzzled because i was taking for granted that with all that cpu power and storage the DM32 and DM42 would only differ in the keyboard layout and the standard menus, being both capable of doing even coffee. Strangely enough it looks like the DM42 has matrixes, while the DM32 has fractions, equation list and unit conversions. Can you explain me why?