All in all I own about 160 HP calculators, and 30 - 40 calcs/hand computers from other brands. This includes some Non-HP RPN calculators, e.g. Novus, Commodore Minuteman (different versions), Omron (12SR), and Privileg (SR 54 NC), where Privileg/Quelle is only a reseller.
Seems I have to count the machines again...
Why do you ask? How many clcs do you have?
In another thread, the excellent quality of the older Sharp pocket computers was mentioned.
I have some of these very nice aluminium casr machines (PC-1212, PC-1250?, PC-1361, and some CE-125).
They're made very nice, and of very good quality,
but I'd never use them daily because of their keyboards.
That was one big reason to buy my first HP back then in 1980. Once you have felt the keyboard of an HP-41, you'll never want anything else, except an HP-48, of course;-)
And the Sharps didn't have RPN.
Raymond