Graphing calculator model TI-89 Titanium from Texas Instruments. Its specifications and main features include: - An integrated Computer Algebra System (CAS) that enables manipulation of mathematical expressions in symbolic form. - A built-in USB port for easy data transfer. - A large screen with a resolution of 100 × 160 pixels that supports split-screen display. - 2.7 MB of flash memory and 188 KB of RAM. - Designed for use in advanced mathematics, engineering, and science courses.