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. Permitted for use on many state and standardized tests. Power Source(s): Battery; Display Notation: Graphic; Number of Display Digits: N/A; Display Characters x Display Lines: 160 x 120 pixels.