The most powerful handheld functionality from Texas Instruments offered in two different styles to fit your needs. The TI-89 and Voyage 200 let you easily customize your handheld by adding new functionality through software applications. Choose the Voyage 200 (the great update to the TI-92 Plus) with its large display and QWERTY keyboard or the slim and portable TI-89. The TI-89 is allowed for use on the AP Calculus, AP Statistics, AP Physics, AP Chemistry, PSAT/NMS Qt, SAT I, SAT II Math IC & IIC.