I'm the exact opposite. RPN calculators are totally natural to me, whereas I get confused on normal calculators. Normal (non-algebraic) calculators are inconsi

I'm the exact opposite. RPN calculators are totally natural to me, whereas I get confused on normal calculators. Normal (non-algebraic) calculators are inconsistent. To get "2+3", it's infix: 2, +, 3, =. To get "cos(45)" it's postfix: 45 cos (and no equals). And something like "cos(2+3)" is a mixture of both. RPN, is always the same, numbers first, then operators, and usually more keystroke efficient. Some operators take multiple arguments. RPN also has the advantage of (rarely) needing a memory register, since the values can be left on the stack and accessed as they are needed.