When you find yourself without your calculator, relax just open it on your iPhone or iPod Touch.
-An array of matrix calculations
-Complex functions real and imaginary
-SOLVE key finds the root of an equation
-Programmable up to 448 lines
-Horizontal mode shows full calculator and vertical mode provides a simplified basic RPN calculator
-In horizontal mode, click on the HP logo to show the back of the original calculator with quick references to common calculations