Tackle the toughest problems with 600+ built-in functions plus powerful HP solvers and</br>Enter data via algebraic entry and easy-to-use interactive tools</br>Switch between three viewing options to enhance learning: symbolic?? numeric?? and graphic</br>See everything you need at once on the dynamic split screen?? which has adjustable contrast for</br>Don't waste time reprogramming: save work and settings as applets (e-lessons) for later use</br></br>Product Description</br></br>HP Graphing Calculator 39GS Calculators</br><br/>http://www.amazon.com/gp/product/B000JEP19W