
10.4: Be aware of a Calculator widget bug
This is exactly why I use RPN instead of standard algebraic notation.
10.4: Be aware of a Calculator widget bug
Intuitive? Huh? I'll agree that it's nonambiguous, but intuitive, no. When I see 1+2*3, I think "One plus two times three", and that's how I expect to punch it in. I do not think "One Two Three Plus Times", so RPN is not intuitive; nonambiguous, sure, but not intuitive.
10.4: Be aware of a Calculator widget bug
It's not necessarily unintuitive, it's just different from what we're taught in school. I learned RPN when I got an HP 48GX for college, and I've never looked back. The appeal of RPN entry is that it's simpler and, as you said, not ambiguous. You first provide the data you're working with and then specify what you want done with that data. It comes down to personal preference; I think it's easier to work in RPN.
10.4: Be aware of a Calculator widget bug
Actually, in RPN, if you wanted to do 1+2*3 you would do 1 2 3 * +.
10.4: Be aware of a Calculator widget bug
Actually, it's 19 vs 19 keystrokes, not 14 vs 28. For the RPN you forgot to count the ENTERs between values (otherwise 2 8 is 28), and for nonRPN there were too many parenthesis as you said (and the last one can be dropped because = closes it automatically).
"Intuitive"
"more intuitive once you get used to it" is a contradiction. To me 'intuitive' applied to software means it works the way you expect the very first time, and you don't have to get used to anything.
"Intuitive"
Exactly. Freaking "rocket science" is intuitive if you are a rocket scientist... 
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