Hewlett-packard 39g+ Programmable Algebraic Graphing Calculator 39g+ Programmable Algebraic Graphing Calculator Display Characters x Lines—22 x 7 Display Notation—Graphic Storage Memory—256K Levels of Parentheses—Unlimited Graphs, Rectangular Functions Graphs, Polar Equations Graphs, Parametric Equations Graphs, Differential Equations Interactive Zoom Programming Steps/Storage—200KB Programming Subroutines Hypothesis Testing Confidence Interval Calculating Hyperbolic Functions Trig/Log Functions Logical (Boolean) Operations Simultaneous Equations Calculus Operations Matrices Complex Numbers Polynomial (Quadratic) Equations Time-Value-of-Money Amortization Equation Editor Direct Algebraic Logic Equation “Play Back” Direct Algebraic Logic Simple Scientific Functions One/Two Variable Statistics Size—3-3/8w x 7-1/4d Replacement Batteries—3 AAA + CR2032 I/O Port USB Cable Ideal for high school math and science. Split screen comparisons. Includes operating batteries.