http://www.viewpoints.com/aboutme/lazcisco Thu, 20 Dec 2007 03:21:30 GMT Reviews by lazcisco http://www.viewpoints.com/Texas-Instruments-TI-89-Graphic-Calculator-review-1e690 The TI-89 is far more powerful than some of the older models in that it can symbolically evaluate derivatives and integrals, something your TI-83 (and not even MATLAB) can't do. It can even solve differential equations for you. Many of the commands are similar to MATLAB, so if you are used to that, it is good. Programming on the 89 is quite a bit more difficult than on the 83, but still doable. Generally, it seems like an 83 will get you through about pre-calculus, but the 89 will help you go further and will help you in calculus (single and multi variable), differential equations, and linear algebra.... Thu, 20 Dec 2007 03:21:30 GMT http://www.viewpoints.com/Texas-Instruments-TI-89-Graphic-Calculator-review-1e690 lazcisco 4