Can we have RPN back?

[Thomas Radtke]

(01-27-2014 03:58 AM)Joe Horn Wrote:  [...]also accumulates each operation into an algebraic expression and shows that too.

Nice idea. If I'm not missing something, there's one inconvenience: The calculator will never know when an expression is 'finished'. You'd either have to clear the accumulator by hand or have a stack of expressions, which grows faster than the RPN stack.