HP-12C gets 'Entry-RPN' or Error in the QSG?

[Joe Horn]

(07-04-2014 12:53 PM)hansklav Wrote:  While preparing an RPN-Tutorial, in which I would like to indicate differences in various RPN-versions, I came across the HP-12C Quick Start Guide of 2008. On p. 7 one can read Pressing ENTER is optional after entering a number, if the next key pressed is an operation., which is (almost) the same text as in the HP 20b/30b User's Guide (p. 13).

So I presume this is an error in the HP-12C QSG, by a manual writer who is not too RPN-literate...

No, it's correct, same as the HP-41 and all the older HP calculators. See the following example: you get the same result whether you include or omit the second ENTER:

2 ENTER 3 + ENTER 4 +

That's because the second ENTER follows an operation (+), as mentioned in the 12C and 20b/30b documentation.