The OEM Texas Instruments TI-83PLUS is a programmable graphing calculator permitted for use on SAT, PSAT/NMSQT, ACT, AP, IB, and Praxis exams. It features a large 64 x 96 pixel, 8 x 16 display, along with 24KB of RAM and 160KB Flash ROM memory. This calculator is capable of graphing 3 recursively-defined sequences and performing financial calculations, including TVM, cash flows, and amortization. Additionally, it offers enhanced data analysis with logistic and sine regressions and includes an I/O port for unit-to-unit link cable connectivity. The device is powered by 4 AAA batteries (included) and features a lithium battery backup to protect RAM memory.