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HP 35s Scientific Calculator | 
| Brand: Hewlett-Packard
Category: CE
List Price: $59.99
Buy New: $54.99
You Save: $5.00 (8%)
New (26) from $49.63
Rating:  111 reviews
Media: Electronics
Autographed: No
Memorabilia: No
Shipping Weight (lbs): 3
Dimensions (in): 6.2 x 3.2 x 0.7
MPN: F2215AA#ABA
Model: F2215AA#ABA
UPC: 883585142859
EAN: 0883585142859
ASIN: B000TDRHG8
Availability: Usually ships in 24 hours
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| Features:
| | Robust and economical scientific calculator | | | 100+ built-in functions; 30 KB memory with 800+ registers | | | Supports RPN and algebraic data entry | | | 2-line, 14-character display | | | 1-year limited manufacturer's warranty |
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| Editorial Reviews:
Product Description
Get professional performance with the HP 35s Scientific Calculator. Professionals and college students will appreciate the flexibility no other scientific calculator can offer, with the choice of RPN or algebraic entry-system logic. Switch between RPN and algebraic entry-system logic at any time. Save time with an impressive array of programmable scientific functions. The HP 35s delivers a large 2-line alphanumeric display with adjustable contrast, raised edges to protect the keys, and a robust library of built-in functions and constants. Large 2-line display with adjustable contrast to easily view entries, results, menus and prompts Simplify physics with 42 built-in physical constants, plus a complete library of unit conversions Get accurate results with edit, undo, delete capability Enjoy its compact size and protective raised edges that are designed for the mobile professional Use strong statistics functions for single and two-variable statistics, linear regression and more Use base-n functions for binary, octal, decimal and hexadecimal number calculation and conversion Perform operations on complex numbers, calculate logarithms, exponentials, inverse functions and more Take advantage of a powerful fraction mode plus fraction-to-decimal conversion Programmable with keystroke programming Durable design with raised edges to protect the keyboard, and includes a premium carrying case Dimensions - Length 6.22 x Width 3.23 x Depth 0.72 (15.8x8.2x1.82cm) Weight - 125 grams (4.4 ounces)
Amazon.com Product Description
Ideal for college students, engineers, surveyors, and medical personnel, the HP 35s scientific calculator offers calculation versatility in one economical unit. For added versatility, the HP 35s lets users choose between RPN or algebraic entry-system logic (no other scientific calculator offers both). It also features a large, two-line alphanumeric display to view entries, results, menus, and prompts with ease. The display also sports an adjustable contrast feature, making it ideal to use both indoors and out. A robust library of 100+ built-in functions and constants also comes pre-loaded for immediate use right out of the box. A robust memory ensures even the largest calculations go smoothly and quickly, and more than 800 independent storage registers allow users to store an equation, then use it again to solve any variable, or employ the equation in conjunction with any of the 100+ built-in functions. The calculator is backed by a manufacturer's 1-year limited warranty. What's in the Box
HP 35s scientific calculator, batteries, user's manual, and premium protective case.
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| Customer Reviews: Read 106 more reviews...
 Best Scientific Calculator Available Today September 5, 2007
David Simpson (Laurel, MD USA)
70 out of 71 found this review helpful
This is a very nice high-quality scientific calculator from HP. The overall design and capabilities are similar to the HP 32SII (equation solver, unit conversions, etc.), but with several enhancements.
Like many recent HP models, this calculator can work in either RPN or algebraic mode, but I use only RPN. The keyboard layout has been well thought out, with most functions being quickly available directly from the keyboard and a few lesser-used functions available through menus. The keyboard has a traditional HP layout and colors, and the keys have a nice positive feel. A very thorough and well-written printed manual is included.
A new feature with this model is that each level in the four-level stack may hold a real number, complex number, or 2- or 3-element vector. Complex numbers may be entered very simply using the "i" key (or "theta" key for polar form); vectors are entered using square brackets. This design makes it very easy to manipulate complex numbers and vectors.
The calculator includes 30 kB of memory, which is enough for over 20,000 program steps. There are 26 main memory registers (A-Z), six statistical registers, and 800 more memory registers available through indirect addressing. Another new feature of this model is TWO indirect registers, (I) and (J).
A few cons: With previous HP calculators, there was a shortcut for entering exact powers of 10: for example, 10,000 could be entered as "E 4". For some reason HP has dropped that feature on the 35S, so you now have to enter "1 E 4". Not a major drawback, but kind of annoying since I used that shortcut a lot on previous models. Another nit is that the function to convert HMS to decimal hours is labeled HMS-> instead of ->H, which I haven't gotten used to yet.
Overall, the HP 35S is a very well-designed calculator, and I would not hesitate to recommend it as the best general-purpose scientific calculator available today. In fact, I bought three (for home, work, and school).
Great Calculator September 8, 2007
A. D. Davis (Nashville, TN)
17 out of 17 found this review helpful
I've been using HP calculators for almost 20 years and am very happy with this one.
The keyboard layout and feel are both absolutely perfect in my opinion. It retains the HP tactile click without having stiff keys with long travel, which is my only problem with the new HP50g (otherwise awesome calculator). I have a big, nasty equation that I used to test my speed with my calculators. It took 30 sec. on my 33s, 25 sec. on my 50g, and 22 sec. on my 48G which I've been using for 10 years. The very first time I cranked it through my 35s, literally <2 minutes after inserting the batteries, it only took 23 sec. This calculator is optimized for cranking through big hairy equations. To me, that's what an engineering calculator is for! I have Mathcad, C++, Matlab, and Mathematica for all the stuff that graphing calculators do, but that's another story...
Pure RPN does take a little getting used to if one is used to the graphing models' RPL, but the 35s implementation is correct. My previous calculator was a 48G, so I found the 4 level stack to be slightly irritating. Took an hour or two to completely get over that when I bought my 33s a while back.
I actually like the tiny batteries instead of AAA because this cuts down the weight of the calculator. AAA batteries in the 35s, which is a very elegant little calculator, would've been insane. Also, what's the alternative? Feeding AAA batteries, 3 or 4 at a time, to a graphing calculator once a month?
Unless it dies on me, I think I'll be very happy with this calculator for a long time.
RPN is standard August 29, 2007
Douglas Dobbin (NM, USA)
30 out of 33 found this review helpful
Tim C is as confused as Charles and is unable to spell my name even though it is printed in the review. I am holding an original HP-45 in my hand. If you type 2 Enter 3 Enter + you get the incorrect answer 6. Tim C's claim of an "error" in HP's implementation starting at the HP-32SII is completely false. I own an HP-32SII also. It works exactly the same way as the HP-45 which predates the HP-32SII by 18 years. I know what I am talking about. I own and use the HP-45, 55, 67, 29C, 41CV, 41CX, 48GX, 49G, 50G, 32SII, 42S, 28S, 50G, and 35s. I guess I need to repeat myself: ALL EARLY HP RPN CALCULATORS REQUIRE THAT YOU PRESS 'ENTER' ONLY ONCE. THE HP-35s FOLLOWS IN THIS TRADITION! Tim C should learn the history before he comments on it. Tim C should buy and use the product before he writes a review. The reviews by Charles and Tim C are misleading. Reviewer Charles has limited experience with RPN and has not explained it correctly. In general you should only have to press Enter once during a calculation with 2 numbers. This is true of the 48G also. Some calculators have a command line at the bottom that is separate from the x,y,z,t stack. For those you MAY press Enter twice but you don't have to. 2 Enter 3 + will work fine. On all the older RPN calculators you enter numbers directly into x and you should not press Enter twice. Again: 2 Enter 3 + will work fine.
Great! September 22, 2007
Daniel P. Mcgrath (Chester, VA USA)
13 out of 13 found this review helpful
HP has done well going back to what works. This is a vast improvement over the 33S with it's poor key layout and hard to read display. The 35S buttons have that classic "HP" feel, the layout is easy to navigate, and the display is nice and easy to read. As a practicing civil engineer, this calculator just plain works - just what I need without a lot of features that I would likely never use.
finally, HP makes an RPN calculator like the old days August 30, 2007
Andrew (Brookline, MA)
12 out of 12 found this review helpful
I used to have a 32SII but lost it many years ago. Since then, I've been looking for a replacement RPN calculator. While the HP33S is RPN, I'm not a big fan of the key configuration. Finally, HP releases a calculator more like its previous versions. If you're a fan of RPN, highly recommend this calculator.
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