[HP-35s] Are bad keys fixable?

[Thomas Radtke]

(08-25-2016 10:34 AM)Logan Wrote:  What is the RPL-solver and is it only available on the graphing calculators?

HP developed an OS first used in the 18C, RPL. Is has been used on the 27S also besides the well known RPL-calculators. This OS provides the solver and the user interface known from e.g. the 17b, if I'm not completely mistaken.

The imo best scientific pocketable calculator (if the Clamshells 28C and 28S aren't counting) offering it is the 27S, but alas no RPN :-(.