I still have an HP15C on my desk that I picked up when I was working
at the Ohio State University and taking EE/Computer Science from '79-
'84. It replaced an earlier model (probably an HP-25) in which both
the battery and LED module failed. The 15C is still ticking right
along with new batteries every 5-10 years <G>.
73,
... Joe, W4TV
On 2022-01-30 7:57 AM, Chuck Guenther wrote:
Interesting discussion of the RPN calculators!
I've been a user of RPN calculators for fifty years now. I started my EE
career in 1966 still using slide rules.
My first calculator was the HP-25C, then went to the HP-67 and several
others after that. My favorite is the HP-28S, which is marvelous for
complex number manipulations.
Was glad to get the info on calculator Apps for the iPhone.
73,
Chuck NI0C
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