HP 12C Story

Don and Suzanne Shepherd shepherd at iglou.com
Fri Jul 22 21:48:51 PDT 2011

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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