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Scientific Calculator With 30KB Ram - Black

by HP
4.7 out of 5 stars  See all reviews (18 customer reviews)
Price: 41.70
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Only 2 left in stock.
Dispatched from and sold by Science Studio.
  • The choice of both efficient RPN and algebraic entry-system logic
  • Programmable with keystroke programming
  • HP Solve application; 31KB memory with 800+ independent storage registers
  • 42 built-in physical constants
  • Adjustable contrast 2-line display with menus, prompts and messages
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Product Information

Technical Details
Item Weight1.4 Kg
Product Dimensions15.8 x 8.2 x 1.8 cm
Batteries:5 Nonstandard Battery batteries required. (included)
Item model numberF2215AA#ABA
Screen Size1
Additional Information
Best Sellers Rank 47,531 in Computers & Accessories (See top 100)
Shipping Weight476 g
Date First Available9 Aug 2007

Product Description

The new hp35s - get professional performance from HP's ultimate RPN scientific programmable calculator - ideal for engineers, surveyors, scientists, and university/college students. Scientific projects require accuracy, functionality and dependability for success. The hp35s deliver this with features that include 30KB user memory, RPN and algebraic logic, a two line display and the time saving HP.

While most members' main interest is in the HP range of models, the club is happy to discuss other models too, at meetings, through the club journal - Datafile, and on these web pages. HPCC is not supported by Hewlett Packard or any other commercial organisation; its activities are funded and undertaken by its members.

Technical Specification:

RPN and Algebraic entry logic.
Powerful two line display with adjustable contrast.
30KB RAM user memory.
Over 100 built in functions.
800+ independant storage registers.
42 built in physical constants.
Pocket-sized - take it anywhere.
HP Solve application.
Single & two-variable statisitcs, linear regression.
Library of unit conversions.
Fraction mode and fraction to decimal conversion.
Inverse functions, cube root, logs, exponents and factorials.

Customer Questions & Answers

Customer Reviews

4.7 out of 5 stars
4.7 out of 5 stars
Most Helpful Customer Reviews
26 of 27 people found the following review helpful
5.0 out of 5 stars A modern classic 10 Dec 2007
By Maarten
Verified Purchase
This is simply a great calculator - well worth the five stars and very good value for money. I have no doubt this calculator will be a modern classic and a big sales succes for HP: many serious calculator users have been waiting for this little machine.

The HP 35S can be used as an RPN calculator, which is a simple and intuitive input method traditionally used by HP. RPN is superior when compared to the awkward and error-prone input method used on most modern calculators - if you want, you can use this standard input method as well (a concession to the sales department at HP) It has many, many functions, many of which are useful and most of which are easy to access. Especially the "solve" function is much more useful than I ever anticipated: it can numerically solve a complicated equation without the need for rearranging the equation; this is a feature that I didn't know I needed until I bought the machine! The calculator is fully programmable: great fun and very powerful - but something I have had little use for upto now. The memory is quite big: plenty to keep all my useful equations in memory.

The build quality is good. The calculator is robust and has an old-fashioned, solid feel to it. The hard case is very useful: the calculator can be used without taking it out of the case. The beautiful design is both pleasing and ergonomic. The user guide is comprehensive as you would expect (and hope) for such a powerful calculator with additional material available on the HP site.

In short: the HP 35S is powerful, easy to use, sturdy, and good-looking - look no further for a serious scientific calculator.
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19 of 20 people found the following review helpful
3.0 out of 5 stars Good but could have been much better 14 Jan 2008
The HP35S is a welcome return to form for HP, but ...

1. There's no communications in the HP35S unlike the 48/49/50 series, so the only way to load programs is to key them in by hand

2. The keyboard quality while OK, is nothing like as good as my old 48G or even my 1990s 32Sii. My 35S had a sticky right arrow key. Mercifully the after sales service is still good and the whole calculator was replaced within a week. The problem is not so much the absence or presence of a positive click, but rather the design and layout: I know it's a matter of taste but I dislike the arrow keys; I would prefer more space between some of the keys; and I thought the old 32Sii layout was more logical.

3. The two line display is nice, and makes RPN rather easier to understand as you can see the top two numbers in the stack instead of just the top one, but it would have been even nicer to have four lines and to be able to see the whole stack. The most irritating feature is that long numbers scroll off to the right.

4. The hex mode is very odd. In hex mode if you enter a normal number say "12" it's treated as a decimal and converted to hex ("Ch"). If you want to enter a hex value you have to add a trailing "h" by keying "blue shift, 1, 6" which is not exactly intuitive. Even more strangely you enter "ABCDEF" by using the keys labelled "HIJKLM".

5. The complex number support is welcome but oddly incomplete. For example the square root button doesn't work. If you enter "-1 SQRT" you get an error instead of "0i1", even if you enter "-1i0 SQRT" you still get an error, even though "-1i0 .5 y^x" does give you the right answer!

Overall I like it, especially the nice case it comes in, but if you want a more usable simple scientific calculator try to get hold of an old HP32Sii or 42S, and if you want a better less brain-dead design then save up for a HP50G or an old 48GX.
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7 of 7 people found the following review helpful
5.0 out of 5 stars HP Back To Basics With The HP35S 25 Dec 2009
I have previously owned a HP35. HP41CX. and I currently use a HP50g. I bought the 35S as a sort of sentimental trip down memory lane triggered by my purchase of the original HP35 in 1973. I was not disappointed. I guess my main gripe is the absence of the polar to rectangular conversion key, sort of unforgivable if you happen to be in the surveying business. There is a work around, but its takes a few key strokes as opposed to just one...

The manual supplied is very adequate and harks back to the days when HP manuals were considered by many engineers to be the best in the business. (HP back then had an extensive test equipment division). You can stretch out on the sofa with a coffee, the 35S manual and the calculator for a good read; rating the documentation supplied against that of the HP 41CX (considered by many to be the apotheosis of calculator documentation)a 7/10 would be appropriate.

The HP35 is a safe buy, a good entry level calculator if you are interested in developing RPN operational skills in order to free you from the inefficiencies of the algebraic operating system.
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7 of 7 people found the following review helpful
5.0 out of 5 stars Absolutely brilliant machine 28 May 2009
At university over 25 years ago I had an HP41C which I though was superb, though there were a few things it wouldn't do, like hex and complex numbers. I love the HP RPN notation which is so intuitive and easy to use. When it was time to replace my current calc, I looked to see whether HP was still producing RPN calculators. The HP35S looks very similar to the HP41C and I wondered if it would live up to my high expectations.
It does!
It has none of the minor drawbacks of the older machine, and it does absolutely everthing (and more) that an engineer could want of a calculator (including hex and complex numbers.) Ergonomically it is spot on, the sloping keys are the same as they used to be. I read one review that complained about the keys - nonsense, they feel exactly the same as the old 41C and are just right.
I would not have any other calculator.
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Most Recent Customer Reviews
5.0 out of 5 stars Different
Bought this to replace my old 11C which finally gave up after more than 30 years!

Find that the key layout is less intuitive than the 11C, but that said, this is a great... Read more
Published 5 months ago by decameron
4.0 out of 5 stars Woks all ok note seems to be a earlier version, but same as current.
Originally ordered a f2215aa#b12 (current model number from a different supplier), but that had faulty buttons. Read more
Published 10 months ago by .
5.0 out of 5 stars Absolutely Superb
Calculators are very run of the mill these days, commoditised, price driven. The 35S is not a cheap calculator, and if you're after functions per GBP, then look no further than the... Read more
Published 12 months ago by g8jcf
5.0 out of 5 stars Reliable Machine
I have used HP pocket calculators since they were first available in the late 1960s/early 1970s.
They are reliable, long lasting - I still have one which is over 30 years old... Read more
Published 15 months ago by Graham Reynolds
4.0 out of 5 stars retro HP RPN
Not made or designed by HP. it is a retro calculator in the HP 35 / HP41C RPN step-branch-loop non object manner. Read more
Published 15 months ago by Mr. M. Macrae
5.0 out of 5 stars HP Scientific Calculator
I have used an HP Scientific calculator for over thirty years now and have found them reliable and clear and logical to use. Read more
Published 17 months ago by T. Johnson
4.0 out of 5 stars A reasonable HP replacement
Bought this calculator to replace a lost 32Sii and an aging (damaged) 15C. Although not up to the quality standards of those 2 calculators it is a much better attempt from HP so I... Read more
Published on 1 Aug 2011 by Timothy S. Hill
5.0 out of 5 stars RPN, ALG, let's have both!!
Hats off to the HP boffins who designed this marvel. My best advice to prospective buyers is 'This is NOT an 'ordinary' calculator' (although it can behave as one if you want)... Read more
Published on 2 Dec 2010 by MTM
5.0 out of 5 stars Welcome Back Scientific RPN - and HP Quality!
To be realistic, this calculator is only of any interest to those die-hards who are old hands at, and continue to prefer, RPN. Read more
Published on 7 July 2010 by Amazon Customer
5.0 out of 5 stars Just what I expected from HP
Have had HP calculators all my working life (more than 30 years) and my previous one (HP 32Sii) was still going strong after about 15 years so I didn't really have an excuse to buy... Read more
Published on 25 Jan 2010 by Andrew C. Baker
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