Model FX 300MS Scientific Calculator, Scientific Financial and Graphing Calculators

I’m still getting used to this calculator, and for me it hasn’t been quite as intuitive to use as the TI calculators I’ve owned, but I’m probably just too accustomed to the TI layout, etc. This calculator does all the stuff I need, which is generally only basic arithmetic and the occasional statistic. I love the 2-line display, and the numbers are easy to read. One thing I don’t like is the absence of an “OFF” button. When you’re done you simply put the protector back on and let it go off in its own sweet time. The slide-on protector has a “quick reference” sticker on the inside, which is nice but not very extensive (it covers modes, multi-replay, standard deviation, data edit and mean). Overall I’m pretty happy with this calculator though, and in this price range I think it is a good value.
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HP 9G Scientific Calculator

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+3×5^2=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.
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Casio ClassPad 300 Touch-Screen Graphing Scientific Calculator

The major drawback of the Casio classpad 300 was its screen. The constrast was so poor that it was hardly usable at all.

Now Casio have replaced the Casio Classpad 300 by the Casio Classpad 300 PLUS, with a dramatically enhanced screen. The constrast is now very good under most lighting conditions. The operating system has also been enhanced, offering amongst other things a choice between the standard characters set and a bold characters set.

All in all, this makes the Casio Classpad 300 PLUS one of the most powerful, integrated and easy-to-use graphing calculator ever.
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30S Scientific Calculator, Scientific Financial and Graphing Calculators

This calculator is the required calculator for University classes I have taken. It is NOT user-friendly and it is NOT intuitive at all. I would NEVER recommend it, and would never have bought it unless I was forced by the university. My prof used it once in a physics lab and made the telling comment “I see why you guys all complain about this calculator”.
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