Texas Instruments TI-89 Titanium, Refurbished

Includes refurbished calculator, slide cover, and battery cover.  Batteries and accessories sold separately. Electronically upgradeable graphing calculator allows you to have the most up-to-date functionality and software applications. 16 preloaded graphing calculator software applications suitable for college math and engineering coursework. Memory management to create folders for specific applications or subjects. Icon desktop for easier access to applications and editors. Pretty Print shows equations and results with radical notation, stacked fractions and superscript exponents. Large 100 x 160 pixel display for split-screen views. Compatible with CBL 2 system, CBR 2 motion sensor, vernier easylink and vernier easytemp systems to allow collection and analysis of real-world data. This versatile graphing calculator features advanced functionality and 3D graphing that makes problem-solving for AP®, advanced mathematics and engineering courses easier. Built-in Computer Algebra Syste