 
Texas Instruments TI-89 Titanium Graphing Calculator
Rating:  -
Jesus!the calculator was made in China...I am in China but I spent 210 bucks to buy Chinese good from USA!Aren't I a fool!Why don't you tell me that it was made in China?
Although the calculator is sort of exorbitant,it is amazingly useful.It seems,with TI89,I don't need to think about math computation any more,the only thing I need to do is to type in equations and data.My father said this will make me more and more clumsy on math problems.I don't know whether he was right or not,but I do think that with so useful a calculator ,my math skill level will drop a lot according to Chinese standards.
Rating:  -
when dealing with higher education math course this is a must have calculator and it's easy to use
Rating: -
This calculator is amazing, but it's not usable on the ACT. If you try to use it, your test results will be cancelled.
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Rating:  -
This is an excellent tool for anyone taking upper level math or physics courses. It brought me safely through Calc I, II, and III, and has served me well through my undergraduate physics study. This calculator has been able to take virtually all integrals I have given it, which never fails to impress me.
My one complaint is that the graphing technology seems a bit outdated; it's certainly better than the TI-83 Plus, but not by that much. Graphics are basic black-and-white, and are rather coarse. A higher resolution screen and heftier processor would be a welcome addition, which is why I gave it 4 stars. However, I have yet to see a hand held calculator that can match this one's abilities and as such highly recommend it to anyone working with math beyond trig.
Rating: -
This is absolutely essential for anyone taking a Calculus class. This is especially true for later on, such as in the later half of Calc 2 and all of Calc 3. After learning how to manually evaluate integrals and differentiate, as you move on to higher level concepts the 89 titanium can be used to do these manual tasks for you, allowing you to focus on the new material and allow you to practice more without wasting time on repetitive evaluations. I love this thing, and would not take Calc and Physics without it.
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