There's really no need for many of us to use a dedicated calculator in the age of smartphones. However, I was attracted to the nostalgia of having my own HP-35 after playing as a child with the original one my brother bought back in 1972. The only major disappointment of this newer unit is that it lacks any heft. It is so light that it fails to convey the same feeling of a quality device like the older models. Because I'm a nut, I took care of this by performing surgery on my calculator and inserting lead plates in it to make it much heavier. By tripling the weight, It now feels like a device worthy of the original HP badge. As a bonus, I could wear it on my shirt pocket as a bullet proof or x-ray shield.

I have RPN calculator emulators on my iPhone, but there are work places we cannot take our phones, and those are not the same feel. Lacking blue tooth, or any other electrical connectivity is a security advantage that keeps out other science calculators "” and enables it to be one of three calculators (and the only programmable one) authorized on National professional exams.
The efficient RPN is addictive and the four-stack effective.
Our only hope is HP will bring the 35s back or is preparing a new iteration with a faster processor, better screen, and the few other features the other two professional exam calculator advantage options have been cited as having.

An inexpensive HP300s+ version with an RPN option "” like the 35s has an Algebraic option, and a proper RPN machine's traditional big Enter key and similar stack would allow teaching young students how to enjoy the speed of RPN, thus broadening their view of the world and grow the market.

PLEASE HP, bring back the RPN 35s. You hooked us on addictive RPN and now you abandon us!

I've used HP calcs w/RPN for decades and my brain works in that mode....1 enter 1 plus = 2. My 15C got stolen, then my 32 died so needed a new calc. This 35 fits the bill. It has that HP key "feel", the layout is pretty familiar to the 32 so not a lot of learning curve. If you're a graybeard like me you'll remember it took a months salary to buy a 41C back in the day and I'm too cheap to buy a swissmicros clone so this at $60 bucks is a bargain. Nice if you like/think RPN, get one you won't be disappointed. When you croak your kid can switch it to algebraic so it can keep getting used.

I have used HP 11C, 15C, 32SII, 42S over 30 years. The exterior design and key layout of HP 35s is even better than the previous models I have used. The package includes brief manuals (one in English and one in Spanish), CD-ROM user manual, two batteries, and a soft vinyl case. The calculators classical dot-matrix style greenish fragile 2-line display is old-fashioned in modern standards. The key response is little softer than HP 42S, and keys make click sounds when they are pressed. (HP 42S has a soft, silent keys.) Once you turn on the calculator, please look the MODE, DISPLAY, CONST menus with cursor keys. It will be very easy to set up the calculator. It has every HP programming functions and logic controls all included, but I probably will not use PRGM mode nowadays. In Summary: With the price of $50+, this HP 32S is the perfect RPN scientific calculator for HP RPN fan's daily uses! ....p.s. There is a bug report about COS(90°) result and (-1/3)-i(1/3) complex number presentation. Please googling around to check.

Hi, I bought this calculator and it seems to be working well. The issue comes because I also bought a book called "useful equations for the FE exam" and I'm using it with this calculator Model HP35S. It was working well but it has an issue because now it gives me a "Memory Full" message. I need the calculator to retain the current equations that it has stored and I can't delete those or reset the calculator because I will lose the time spent getting the equations into it.

I checked the memory usage and it gives me 162 kb which should be enough to run any equation but it is not running all of them. Please let me know how to fix it without deleting the equations it currently has. This can be a very big problem during my exam and I want to make sure I can fix it quickly if it happens during my FE exam.

I'm trying to resolve it but in the meantime the only solution I found is to delete all the stored equations which in my case is not a solution but creating another problem. I need to resolve this before my exam and I also need to be able to run any stored equation on the calculator.

Please help.

Regards,

GM