HP 35s A Brief Introduction to RPN

A brief introduction to Reverse Polish Notation (RPN). There are plenty of videos and websites which will explain it more fully, but it's really quite simple and I wanted to show how intuitive the operations on the keys are once you understand what is going on.

[Doombot-]

I found an HP-35 in an e-waste bin a few weeks back. Research tells me that it’s a version 2, and was manufactured in November of 1972 - so it turned 50 last year! No battery & a broken charger. Luckily, for now, I can run it off of my variable power supply; all I had to do was open it up & clean off the coffee from the on-switch contacts. I was born into the age where I used a TI-nspire to get through my high school & college math/engineering courses, so I had never dabbled in RPN before. Thank you for the explanation; I’m super excited to get to put this amazing piece of history to use once more!

[gregorydaley]

Thanks so much for your excellent videos Logan. I love how unexcitable you are. That’s what I need. I got a degree in engineering, I passed the EIT back in 1999, I want to get back into doing engineering work.
I just dusted off my HP 35S and your videos are a big help.
Thanks so much

[EfieldHfield_]

Looking for a video to explain RPN to my daughter. Good start. I love RPN so when I explain it I get too excited - you are much calmer than I.

[LIKEABOSSS]

Hi! Do you know how I convert the programming into exponential notation?

[walnuthills]

How do I set the number formatting the way you have it (integer entry, full scientific output with all viewable digits)?

[mayranavarro]

how do i find the the scientific notation using mode 4?

[michelebender]

By pressing the blue arrow key, clear and "3", does that erase all programs on the calculator?

[andreduartebueno]

Calculadora excelente. As calculadoras HP RPN eram imbatíveis. Foi um erro parar a fabricação. E agora, com a proibição de celulares nas escolas e universidades, iriam vender bem.

[sirmorph]

Gracias Bro, esto me va ayudar entender su uso.

[vartikcsaba]

Pentel Sharp Kerry! How it holds up, and how this calculator holds up?

[amramjose]

Unfortunate this was the last good, non-graphing, RPN calculator HP made. To go from the maker of test equipment and the finest calculators in the scientific and engineering world, to a pc/laptop and printer company is sad.

[jmfa]

One comment, the inclusion of parentheses might change your answers a bit. This was one of my determining factors in migrating from the Texas Instruments SR-51 that I started college with to the succession of HP calculators (HP-45. HP-25, HP-67) that I ended college with, back when the climate-change folks were warning of impending ice age, rather than the current concerns over increasing global temperatures. I'm not a dinosaur, but I do remember them from my youth.

[mtkoslowski]

You do sound coherent, but I cannot get past the reflection on the calculator.

[JeffHochberg]

It's a crying shame that HP decided to get out of the calculator business. At the very least, they should have spun the calculator division off to a separate entity. If they thought hat people using smartphones in place of a calculator was going to be the end of them, then it's obvious the bean counters were more involved in the decision process than anyone else.

OK - I feel better now! :-)