Casio fx-9750GIII vs. HP35s - Professional Use

[nickapos]

(12-16-2023 04:53 PM)wb.c Wrote:  

(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.

You can definitely do this with plus42 and quite possibly with free42. The printing functionality also exists in hp42. You can simulate the tape printing, either printing in normal or trace mode. The trace mode prints the program execution step by step and unless I am mistaken it was designed like this especially for program debugging. I have been using this for a while now in a similar manner like the adding machine tape.
It works well in mobile and desktop versions as well. If you have lots of inputs that you want to review or intermediate results you can have a tidy output on the tape.
But I would argue that hp prime is superior in this because you can keep the whole history.
You can also simulate somewhat this with hp50g but it’s not as straightforward as with prime or plus42.
Another way to do this in 50g is to keep your input in a list for future review and update and do whatever operation you want to do on this list. Again not as straightforward as with prime.