Michael Black wrote:
On Tue, 18 Feb 2014, Brian Reay wrote:

Either way, RPN as the user interface has become a 'niche' market. Do HP
still offer RPN?

Yes, but they are still higher priced, so you'd be going out of your way
to buy one. I seem to recall seeing one in a flyer that could be
switched between RPN and "normal", which I suppose has advantages. But,
if you have both, I suspect the pull is towards "normal".

HP calculators were always the most expensive, at least in the UK.

I think Casio probably have the bulk market sewn up. Anything you can't do
with one of their £8 scientifics (other than perhaps function plotting) is
probably something to do on a package.

I have a minor collection of early scientific pocket calculators. Some
TI, including the one that could be hooked to a printer (and the printer).
And some HP, but the batteries don't keep a charge.

I should get one of the HP going, not only are they RPN, but they have
LED readouts, astonish people with the ancient technology. Just as soon
as I figure out how to get that battery clip back on my TI LED watch from 1977.

I suppose I have an informal collection as I probably have all of my old
calculators.
I never reduced myself to a digital watch.