Vinny RPN Calculator - Version 1.22 Vinny RPN Calculator is a Reverse Polish Notation utility program for science and engineering students. It temporarily converts the computers numeric key pad into a RPN calculator by allowing direct use of key pad digits, [+,-,*,/] keys, [Enter] and [Up/Down Arrow & Page] keys. Trigonometric and logarithmic functions are provided by mouse clicking on dialog box buttons. Number inputs can be decimal or exponential with dot or comma (European) digit separator. Linkage to other applications is available through use of the Windows clipboard. Optional features include window stay on top, window shrinkage and a floating numeric key pad.