More from Amazon.com : http://www.amazon.com/gp/product/B00006D2Q1?tag=purrfectcatdi-20

Texas Instruments VOY200/PWB Graphing Calculator

Flash technology allows electronic upgradability for future Handheld Software Applications
Memory 188K bytes of RAM 25 MB of user available FLASH ROM
Intuitive icon desktop for easy navigation and organization of Handheld Software Applications
QWERTY keyboard for typing
Large easy-to-ready 128 x 240 pixel LCD
Preloaded with popular applications including The Geometers Sketchpad