0ur opinion:

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Texas lnstruments Voyage 200 Scientific Calculator with Graphing - Get the best Tl tool for College Calculus, Engineering, and beyond! This latest in the line of Tl handhelds is a must-have for College Math and Engineering. The Voyage 200 handheld has a huge 2.7 Mb of Flash R0M, lots of pre-loaded Handheld Software Applications (Apps), and a real-time clock. Not to mention the fact that it comes with the Tl Connectivity USB cable for Windows and Macintosh computers. lt still contains all of the inherent functionality of the Tl-92 Plus, including 3-D rotations and contour plots, symbolic manipulation, systems of equations, syntax listings, and much, much more. The QWERTY keyboard on the Voyage 200 keeps programming and note-taking as easy as ever! Allows Mathematical expressions to appear on the display the same way as they are written on the board or in texts Uses 4 AAA alkaline batteries and a back-up lithium battery (CR1616 or CR1620). Backup battery pre-installed, and AAA batteries are included


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Buyer's feedback: - * It's a Wow Calculator, The Thecnical Manual is on a CD to Save Paper ...
I Would disagree if this calculator has print its manual, because is over 2000 pages, and all are in PDF file. Beautiful calculator, very powerful. Bulky but necessary, wish that they could redesign its cover like sliding it. (like the TI-83, 84, 89). Wonderful. Would recommend.

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Buyer's feedback: - Great
Comes with everything you need to get it started right away. Good price and a easy-to-use online manual.

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Buyer's feedback: - * Best calculator on the market ...
With large screen and QWERTY keyboard this calculator should be located in category of computers, but with size and price of calculators. QWERTY keyboard is essential if you want to do programming - doing this on multi-function keyboard of TI-89 is close to impossible, and PC tools that TI provides for programming are outdated and primitive.

Screen is the largest among calculators available on the market, with very good resolution and contrast. Be aware that size and weight are such that this device is rather desktop than pocket one. But... who needs to compute eigenvalues of a matrix when riding a subway?

I own practically all models manufactured by HP, TI, Casio and Sharp (including some highly historical items; I have such crazy hobby :), but this one is THE BEST

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Buyer's feedback: - Probably the last calculator you'll ever need.
I'm going to assume anyone reading this review is already considering or has already seen the TI-89 (or TI-92 plus, or TI-89 Titanium). Rest assured, this is the same ridiculously powerful machine, with distinct improvements. I've had mine for five years and I STILL haven't discovered everything it's capable of (blame that on the manual or my not reading it if you must). It's a fantastic mathematical tool, and I use it frequently as a portable table of integrals and to solve complex equations. It's also fantastically sturdy; I've dropped it and accidentally knocked it off tables multiple times and it's still in great shape.

Compared to the TI-92+, the Voyage 200 uses AAA batteries, is in a much smaller case (which just fits in a pocket), and has 2.7 MB flash memory to store stuff in. It can also run the latest AMS version.

Compared to the TI-89 Titanium, the Voyage 200 lacks the USB port, but the QWERTY keypad makes it a LOT easier to type in symbolic calculations with different variable names. The V200 also allows you to type in the names of functions that don't have their own dedicated key, without having to go through the catalog menus. For example, the keypad has a dedicated ln() button, but all you have to do is type log() and you'll get base-10 logarithms. You can also do that on a TI-89, but it's more cumbersome. The larger screen means the Voyage 200 uses a larger font by default, and you can see more with graphs. It really is helpful.

In short, if you're in high school and will have to deal with standardized tests, get the TI-89 titanium. If standardized tests are not a problem but you still need a calculus-solving behemoth of a calculator, go with the Voyage 200 for all the reasons I listed above. I would not buy it if you already have an 89 or a 92, since you've already got a nearly identical model.

Final thoughts:
If you want RPN, look for "Lars' RPN for TI-89". I doubt it's much like RPN on HP calculators, but it's something. I've got it running on my V200 with AMS 3.10 and it seems to work fine. There's also the "Hail Equation Writer" by Samuel Stearly (again, check online)
TI reserves 1.7 MB of that 2.7 MB for their own installable flash apps. You can remove that limit and use the full 2.7 MB for flash apps or your own programs with a use-at-your-own-risk program called Xpand (search for "Xpand V200")

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Buyer's feedback: - * Most Awsome Calculator Ever ...
This calculator does everyting the TI 89 and TI 92 do, and more. this calculator is idea for Multivariable Calculus. when you draw a 3d graph on this calculator you can actually tell wat your looking at, unlike the TI 89 and 92.