The Stack is 54 years old! (at least the German Patent for it is)

The following link is a copy of the Patent application for the use of a stack to perform mathematical operations. We take this idea for granted today as a method for processing data, but the idea can be traced back at least this far. http://www.fh-jena.de/~kleine/history/software/BauerSamelson-patent-de1094019.pdf