Ocapy is a free scientific, graphing, and engineering calculator for PC implementing the well-known reverse polish notation (RPN) available on Hewlett-Packard calculators. Ocapy stands for an "Original Calculator in Python". The main features are: calculator software running on any windows desktop, laptop, or notebook under RPN (reverse polish notation), optimized use of a totally reconfigurable keyboard, and limited use of the mouse, selectable accuracy using a multiple-precision math library, handling of experimental figures and automatic error propagation calculation, plotter, programmable, HP like SOLVER and HP like MES (Multiple Equations Solver).
What's new in version 0.402
ReleaseAugust 27, 2012
Date AddedAugust 27, 2012
Operating SystemsWindows, Windows XP, Windows Vista, Windows 7