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* Upgradeable operating system. * Sixteen preloaded graphing calculator software applications (apps), including EE*Pro®, CellSheet™ and NoteFolio™. * Built-in USB port with cable. * Calculate with precision. * Display expressions in proper notation The TI-89 Titanium graphing calculator features advanced functionality and 3-D graphing that makes problem-solving for AP*, advanced mathematics and engineering courses easier. Built-in Computer Algebra System (CAS) allows you to explore and manipulate mathematical expressions in symbolic form. Features 16 preloaded graphing calculator software apps including EE*Pro®, CellSheet™ and NoteFolio™. Solve equations symbolically; factor and expand variable expressions; complete the square; and find anti-derivatives, computer limits and exact solutions in irrational forms on a powerful CAS platform. In Good Shape. Works Great!