Reverse Polish notation (RPN) is a mathematical notation in which every operator follows all of its operands. bla bla blah... The reverse Polish scheme was proposed in 1954 by Burks, Warren, and Wright and was independently reinvented by F. L. Bauer and E. W. Dijkstra in the early 1960s to reduce computer memory access and utilize the stack to evaluate expressions.

- Wikipedia

I need to see it in action.

- Me