Title: It's a great product, but Amazon charges too much
Review: The TI-89 is a great calculator. It comes with EVERYTHING you could ask for. (It even has the speed of light preprogramed) You can do any type of graph, even 3d, convert lightyears to parsecs (or millimeters) and factor polynomials. With the Graphlink, you can add tons of games :) and other programs. You can get the Doors OS. Be warned, I got the TI for a lot less and there was no shipping time/$$.
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