TI-89 Titanium TEXAS INSTRUMENTS Never opened. Includes batteries. Graphing calculator handles calculus, algebra, matrices, and statistical functions 188 KB RAM and 2.7 MB flash memory for speed; plenty of storage for functions, programs, data 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