HP 9G Scientific Calculator

List Price: $39.99 Discount Price: $39.95

Features:

• Simple-to-use graphing key
• Easy metric conversions
• Memory functions for storing and retrieving data
• Conversions to and from degrees, minutes, and seconds
• 1-year warranty

Customer Reviews:

high school calcs [Posted on 2003-07-07]
This calculator was for the 13 year old for school. Being the local `nerd' I got tagged with `picking out a good one' for her.

Casio MS115:

Scientific [no graphing]. This calculator is cursed by having its documentation not written by a native U.S. English user. Common commands and functions are easy to access. For the others, while in most cases one can `figure it out' from these docs on more than one occasion I was forced to `hunt and peck' to uncover some unintuitive key combo. [You think an antsy 13 year old girl would do that? ... dream on].

The Casio has a good keyboard and display [2 line] and a rudimentary `root finder' [it will solve for `X']. Don't expect much help from teacher or other students as yours may well be the only Casio around.

I mention it because her cousin used a Casio MS115 in pre - algebra and loved it and because when it gets lost or stolen at school her mom can buy a new on, cheap, at the wal-mart across the street from the school.

The HP 9G

This keyboard is great not at all stiff like the HP 49g or 30S a wonderful improvement. The letters and screen are very readable. A great deal of VERY HELPFUL material, FAQ and the like are downloadable in PDF format from the hp.com/calculator web site. Be warned the site is slow.

Your almost `mixing apples and oranges' to consider this calculator in he same breath with the Casio. The 9G is that much `more' of a calculator. Until one starts Calculus it is `enough' for maths. Compared to the `High School Standard' T.I. 83 Silver the HP [which is more accurate, by the way] is, roughly 100 bucks less ... a real number when you figure there is a 90% probability of a pretty silver calculator being stolen or lost in the first year raising to 99% over 3 years. You can buy two HP 9G, here, at Amazon, and a pizza, somewhere else, and still not spend half of what the T.I. costs.

A calculator is a incomplete maths device. Any and all will be short some function or feature you just, `have to have'. All one can do is try to pick a `best' tool for a given job. It would seem that the HP 9G would be as good as any and better than most as a `school calculator'.

Good Calculator - Little Documentation [Posted on 2003-12-06]
This is a good calculator with a lot of powerful functions. But, it has practically no manual with it and the one it comes with is difficult to understand. For the most part your on your own.

Warning, this is an HP without RPN [Posted on 2004-03-09]
This is an HP calculator without Reverse Polish Notation entry. This is very similar to TI calculators with an algebraic-type notation input. Those of us who have used the very intuitive (in my opinion) RPN over the years, I am astounded that this is an HP calculator that fails to mention that it is not RPN; not on the box, not on the Amazon description, nowhere. I would return this calculator other than the anti-theft package is destroyed after opening (so it is not returnable), to only find it is a TI-like algebraic input.

If you expect RPN (which I did in any HP calculator) DO NOT BUY THIS!

Let's move along, there's nothing to see here. [Posted on 2004-04-02]
I'm begging you not to buy this calculator. It is not just terrible, it is REALLY terrible.

Oh, sure, it does a little graphing and will calculate the tax on a new PS2, but what you can't see in this picture is that the graphing window has fewer pixels than the icons on your desktop (really). It is USELESS as a graphing calculator.

But that's not all, the number display is so small that it's almost impossible to see the decimal point, and there are no comma's in the display, so you can't tell the magnitude of the number (quick, how many zeros: 000000000 now how many: 000,000,000). Click on the picture to enlarge and look at the display. See the tiny dark smudge near the center of the bottom of the display? all the numbers are displayed to the right of that smudge in the bottom half of the display.

This is something you won't enjoy, trust me.

Look, I only want what's best for you, now go buy a casio fx-9750G. It's almost the same price and is actually something you'll use.

Oh, and brush your teeth once in a while for crissakes.

Not perfect - But gets it right where it counts - Buy it! [Posted on 2005-01-28]
I bought this because my HP-48 is too big to lug around all the time. Keypad has nice tactile feel. Snap-on rigid case and slide-out plasticized 'quick-reference' guide are good (NB I haven't dropped it yet, but it looks fairly durable...).

I agree with other reviewers that the display of graphs is poor and the display clarity is bettered by other brands/models. In my opinion, the graphical display mode is only useful for viewing a quick sketch of a function. Text/number display is adequate. If the graphing of functions is important to you it may be better to look elsewhere and accept a compromise in other areas.

Most other brands in the price range claim 'algebraic entry - enter problems just as you write them on paper'. In my experience this is never the case - they all seem have exceptions and rules to be remembered and even simple operator precedence (i.e. 2+3x5^2=77, not 227 or 125) is not always got right. HP9g is very consistent and correct in this area. Implicit multiplication (i.e. key 2cos(30)instead of 2XCos(30) or 2A for 2XA) eases problem entry and makes a displayed formula more readable. No built-in complex number handling is a minus point for me. Reviews elsewhere show the HP9g maintains accuracy at extreme values of function arguments - reassuring for professional use. As a working engineer these points are far more important to me than having the best possible display.

Large memory for previous calculations - you can scroll back 25+ lines to check or edit and re-do a calculation.

Quick easy programming in a version of the BASIC language is also a plus point. IF,THEN,ELSE, GOSUB and FOR...NEXT are all supported. Also INPUT and PRINT ease data input and results display which is a major bugbear of most calculator programming.

As you've guessed I like this little calculator. It's no match for the HP professional models (at 6-10x the price...); the graphics might have been better left out; others have better displays: but as a everyday professional tool I find I can use it quickly and intuitively and trust the result where other brands in the same price range have left me wondering if I have really got the answer I wanted.

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