Performs 535 statistical, trigonometric and other functions. WriteView technology displays formulas as written in textbooks. DAL (Direct Algebraic Logic) makes it easy to enter formulas into the calculator. Multi-line playback and editing function. Nine independent memories and four programmable keys. Ability to solve three simultaneous equations, two variable statistic functions and fraction calculations. Permitted for use on AP Chemistry, AP Physics, PSAT/NMSQT, SAT I, SAT II, Math IC and Math IIC tests.