Texas Instruments, Inc. TI89 is a calculator with 188 KB memory, requires 4 AAA battery(s) with Advanced Mathematics Software.

One of the most powerful handheld devices from Texas Instruments, the TI-89 lets you easily customize your handheld by adding new functionality through software applications (apps). With in built features such as a Computer Algebra System (CAS), where your students are able to evaluate mathematical expressions symbolically or numerically. Liner Algebra Operations, Symbolic differential equation solving, Liner and Non-liner equations and display return in general or matrix formulas. Pretty Print, allows for mathematical expressions to displayed as they are written in textbooks and a text editor for document cut, pate, copy and save.

New Apps are being developed constantly.