GRPN 1.3.4 Description:
GRPN is a graphical reverse polish notation (RPN) calculator. It is written in C and uses the GIMP Toolkit (GTK) on top of X11. GRPN was developed under Linux but has also been tested under SunOS and Solaris. It is written in C and uses the GIMP Toolkit (GTK) on top of X11. GRPN works with real numbers and complex numbers. Numbers can be displayed in 4 different radix modes, and complex numbers can be displayed in either Cartesian or polar form. GRPN uses a stack and reverse polish notation to evaluate expressions. The stack in GRPN is infinite and limited only by available memory.