More on Reverse Polish Notation

Reverse Polish Notation (RPN) or postfix notation is widely used in computer science because of the simplicity of implementing a 
stack-based computation system. The PostScipt language we used to make GMT graphics is postfix, for instance. 
To learn more about RPN or postfix, watch this YouTube video explanation:

..  youtube:: 7ha78yWRDlE
    :width: 100%
