Hey all. I'm a freshman in college. I'm in the Computer Science BS course, and am just about to start our 2nd semester. According to my suggested scheduling for my course I will be taking Tech Math II, Calc 1, Calc 2, and Differential Equations. I do not own a graphic calculator, and with Christmas right around the corner, I figured it would be a good time to start looking for one. Could someone please post a couple reviews on these calculators? I want something that is easy to learn and something that will get me through those classes without having to purchase another. I've heard a lot of good stuff on the TI-89 Titanium but I'm wondering how easy the user interface is? Could someone give me a hand! Thanks a bunch!!