The Texas Instruments TI-83 Plus Graphing Calculator is an easy-to-use graphing calculator for math and science. It lets students graph and compare functions, as well as perform data plotting and analysis. Its Flash ROM memory allows students to update and add software applications. Plus, you can even use it at exam time. The TI-83 Plus graphing calculator is allowed to be used on the PSAT, SAT, and ACT college entrance exams, IB, and AP tests. It even comes pre-loaded with the StudyCards and Vernier EasyData apps.