Preloaded with software, including Cabri Jr. interactive geometry software. Up to ten graphing functions defined, saved, graphed and analyzed at one time. Advanced functions accessed through pull-down display menus. Horizontal and vertical split screen options. I/O port for communication with other TI products. Power Source(s): Battery; Display Notation: Graphic; Number of Display Digits: N/A; Display Characters x Display Lines: 16 x 8.