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 Sources: Battery Display Notation: Graphic Display Characters x Display Lines: 160 x 120 Memory: 188KB RAM 2.7MB ROM.