Re: Hypersimple & Dreadfully Unnatural Grammars

> Enlighten me... What is an "RPN" language?  I thought
> I had heard of most of these..
RPN is the "language" of HP calculators.
They decided to Reverse the Polish parentheses-free Notation
so one merely keys-in "5 7 *" to get 35. There are some
parallels with SOV human languages, and it entices one
to think that it might be easily machine-parse-able.
That would be my executive summary ... plus:

http://www.hpmuseum.org/rpn.htm