Casio fx-9750GIII vs. HP35s - Professional Use

[wb.c]

(12-16-2023 07:50 AM)Steve Simpkin Wrote:  I think it is ironic that the first calculator to allow natural algebraic "textbook" entry was the HP-48SX in 1990.
EduCALC catalog - HP-48SX

Wow, never actually knew this fact. That is ironic for HP. They went long on RPN, and now they are all but out of calculators altogether. I think the one thing that might have extended RPN relevance would have been a usable entry/input history. As others mentioned, even older mechanical adding machines printed the input history on the tape, and this was valuable to check entires. I don’t think there a single RPN calculator has this ability. RPN is basically like manually writing a program that is combining values with operands. It would be nice if you could set a start point and do operations and then when you have a final result, you can then review the entire input like a program and if there is a mistake, fix it and get a new result. That would be awesome.