TI-89 Titanium Programmable Graphing Calculator Display Window160 x 100 pixels Display NotationGraphic Storage Memory2.7MB 3-D Graphing Graphs, Rectangular Functions Graphs, Polar Equations Graphs, Parametric Equations Graphs, Differential Equations Interactive Zoom Programming Steps/StorageMemory limits Programming Subroutines Hypothesis Testing Confidence Interval Calculating Hyperbolic Functions Trig/Log Functions Base Conversions & Math Logical (Boolean) Operations Simultaneous Equations Calculus Operations Matrices Complex Numbers Polynomial (Quadratic) Equations Equation Editor Equation Playback Direct Algebraic Logic Simple Scientific Functions Variable StatisticsTwo Size3-3/8w x 7-1/2d Replacement Batteries4 AAA + Lithium (included) I/O Port USB Cable Included Permitted for use on many state and standardized tests. Hp Calculator 32sii