HP 12C Story

Veli-Pekka Nousiainen nousiainen.velipekka at gmail.com
Sat Jul 23 04:23:02 PDT 2011


To me the hidden function has been memorizing the digits.
12C can use 10 digits, new models 12/13 digits
in physics you rarely need more than a special serial number ;-)

On Sat, Jul 23, 2011 at 09:59, Roger Hill <rhill at siue.edu> wrote:

> Hi again,
>
> Sorry if the :-) at the end didn't belay the True Nature of my
> statement.  I guess one could say that, on MY calculator, the
> "function" is invoked by turning the calculator over, reading the last
> 5 digits of the serial number, interpreting it as a percent (i.e.
> 00314% = 3.14), and deciding that further digits are not needed in
> financial work.......
>
> More seriously, I don't know of any way to get pi except by user
> programming (but then again, as I said, I have not used the calculator
> much).
>
> Sheepishly,
>
> -- Roger
>
> ------------ On Don Shepherd's message ------------
>
> > hidden function giving Pi on 12c?
> >
> > I've never heard of this.  How do you invoke the function?  You
> > don't mean a user keystroke program do you?
> >
> > thx, Don Shepherd
>
> > ----- Original Message -----
> >> From: "Roger Hill" <rhill at siue.edu>
> >> To: <hhc at lists.brouhaha.com>
> >> Sent: Saturday, July 23, 2011 12:43 AM
> >> Subject: Re: HP 12C Story
> >>
> >> Hi all,
> >>
> >> I don't have any exciting stories, but my father bought an HP-12C
> >> after his HP-80 started developing keyboard problems.  I still have
> >> both calculators but haven't used them to any extent.  The 12C
> >> claims to be made in Malaysia, and its serial number is MY72800314.
> >>  I guess this indicates when it was made (28th week of 1987 ??),
> >> and also that it contains a hidden function giving the value of
> >> pi... :-)
> >>
> >> -- Roger Hill
>
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