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TI-89 is so much more user friendly than TI-83 in my opinion. Whereas TI-83 is option-driven, meaning you have to dig through menus and catalogs to highlight the option for the command you want, TI-89 is entirely variables/functions/commands driven. All objects have a corresponding name that you can simply type in and activate. It's in between the TI-89 and the TI-83 in terms of features - apparently it is now discontinued, but it can be had on eBay for less than the 83 or 89. When I got it, it was marketed as a 'graphing calculator for engineers'.

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Posted byChemE4 years ago
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So I just switched my major to ChemE and was looking into buying a calculator soon so that I can be comfortable with it by next fall (I haven't taken math in 2 years and want to brush up on my calculus over summer). I was looking at the HP Prime and the TI Nspire CX CAS for graphing, and then either a HP or TI scientific calculator for tests that don't allow graphing calculators. If I get the HP Prime, I would want to get a HP scientific and vice versa. Does anyone have any suggestions?
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