The TI Nspie CAS is very similiar to the Texas Instruments TI Nspire. The main difference is the CAS, which stands for Computer Algebra System.

 

    The Nspire CAS can display and store numbers symbolically, instead of as floating numbers. This makes the TI Nspire CAS comparable to the TI 89 Titanium and the Voyage 200. In the same regard, it is most likely that this TI calculator would be used by college students.

 

    The one drawback for the TI Nspire CAS is that it does not come with the TI 84 plus snap in keypad. It also is not compatible even if you borrowed one from a friend. The Nspire CAS does not have a QWERTY keypad making it a perfect graphing calculator for the SAT's and AP exams.