Customer Reviews
Much better than the HP-33s 
2008-06-23
I own this HP-35s and the HP-33s, both I used for the NCEES PLS Surveying exam. The 35 is much better in every way than the 33. The 35 is much easier too look at, all the keys do not run together and it is set up much more systematicaly with menus and such rather than everything scattered all over the keyboard, and it has more memory than the 33. Only thing I didn't like was the manual comes on CD, if you want hardcopy you have to print it yourself.
A very nice instrument 2008-06-19
This is an excellent calculator. With the exception that it is not a graphics display calculator, it appears to be able to do just about anything that would be needed. As has been noted in many other reviews, the feel of pressing the keys is superb. It is especially good that entering a program is almost identical to performing calculations, i.e, you don't have to learn one way of doing things for calculating and another way to make a stored program.
Great HP Product 
2008-06-16
This is a great calculator. The only thing wrong is you have to call HP to get a paper edition of the manual. That is free though, and the manual is on the CD included with the calculator as a pdf. This is a nicer calculator than the ones they are currently selling on HP's website.
HP35s Calculator 2008-06-09
Excellent number cruncher!, I was used to the HP48 in college and then tried other brands w/o RPN. No good, I had to go back to RPN. I work as an engineer and these days most number work is done by the computer, but the times I do need a calculator, I want an HP.
I do wish the screen was bigger so I could view more lines of numbers, but didn't want to spend the money on one like that, plus I wanted the wider ENTER key of the 35s.
Good basic engineering and advanced math calculator. 2008-06-06
Just the right replacement for my olf HP reverse polish logic calculator which was so popular decades ago. Harder to find now, this one offers all my favotie features, including a large ENTER where it is traditionally located.
Great preice for a great calculator.
HP 35s 2008-07-25
My first HP was the 35 and I've been been buying HP's (lots of them)since the 70's. Used the 33s for 2 years but I was disappointed in the display and buttons but liked many other features. The 35s retains the good features of the 33s but with a number of improvements such as the equation editor and improved button (Enter) location. The 35s is just what I've been looking for - well done HP.
Excelent Return to HP Quality 2008-07-21
What can I say? This is an excellent low priced non graphical scientific calculator using RPN entry.
I like the "Classic" look and feel, and have enjoyed using it to solve some simple and not so simple problems I give to my classes (such as Newtons Law of cooling for dead bodies, Radioactive decay, percent oxygen bound to hemoglobin etc).
A great buy for those who do not need a CAS of graphing capabilities!
I highly recommend it!
HP 35s 2008-07-06
The calculator was functional. I had to learn a different way of working with it, as it does not have a equal button. The dual display is a little difficult to work with, if you have never dealt with it before. My last scientific calculator was a HP 22S which was over 18 years old and unfortunatley broke. I just have to get use to dealing with the newer methods and techniques of this calculator. HP does make a great product and I'm sure over time I will learn to work with this new model also.
HP35s Perfect for RPN based technical math. 2008-07-04
I went to Texas A&M in 1981 so I learned math with RPN and the HP 10C. It is great to have something as durable and easy to use as that older model. This one just adds icing to the cake by adding programmability.
Excellent -- but not for complex math 
2008-07-01
It's a fine calculator. I won't go over RPN vs. algebraic and the other features so thoroughly covered in other reviews here. Let me focus on the only "con" that limits it from being a great calculator:
It has lousy handling of complex values.
What do I mean by lousy? I'm not so bothered by the lack of rectangular to polar and back. What I AM bothered by is:
-- No complex square root or square
-- No complex log10 or 10^x
-- No complex hyperbolics
-- etc, etc, etc.
In short, the complex math functions of this calculator are pretty much limited to +-*/ and a smattering of other functions (ln, e^x, y^x). I mean, come on -- a calculator that handles complex numbers but gives you an error for sqrt(-1)?!? We can use the smattering of supported functions to compute some of the missing functions above, but why should we need to??
Most of my use is engineering, where log10 is important. If you never need to compute a dB, this calculator might fit your needs. For me, I'll probably return it.
