12C Desktop Equivalent

[BliztT]

I am new to this forum and have tried to search for the answer to this question, but have been unable to find anything; so, I apologize in advance if I am asking a question with a well-known answer.

I am wondering if there is or was a desktop equivalent of the HP12C? Or something similar?

Thank you very much.

[rprosperi]

In July of 1977, HP introduced the HP-92 Desktop Financial Calculator, see here:

https://www.hpmuseum.org/hp92.htm

This did not follow the 12C, it actually preceded it by more than 4 years. And although the HP-70, -80, -22 and -27 Financial models appeared before this, the 92 had an improved solver and I believe was the first financial model to include depreciation by various models.

Pretty scarce these days, but they do appear on eBay, etc. from time to time, though never cheap.

[BliztT]

Thank you, Bob. I just googled the model 92 and it looks very interesting. I appreciate your response very much.

[BruceH]

Do a search for "Victor V12 calculator". It's not a great deal bigger than a 12C but it has an angled display so easier to use on the desktop. It also runs off two AAA batteries so expect the Universe to run out of heat before they need replacing. :-)

[Steve Simpkin]

(06-12-2022 06:09 PM)BliztT Wrote:  Thank you, Bob. I just googled the model 92 and it looks very interesting. I appreciate your response very much.

As Bob mentioned, the HP-92 is really nice financial model that is similar in several ways to the HP-12C. The October 1977 edition of HP Journal has a nice article on the HP-92.
HP Journal magazine - Oct 1977 - HP-92 Printing Desktop Financial Calculator

A very nice (Windows) emulator for the HP-92 is available at the http://www.teenix.org website.
HP-92 Calculator Emulator software (Windows)

The HP-92 Owner's Handbook is available here:
HP-92 Financial Calculator Owner's Handbook


As a side note, Dr. William Kahan worked on some of the financial algorithms for the HP-27, HP-92 and HP-12C. He had a lot to say about how well the HP-92 worked. He also strongly disagreed with the initial price that marketing decided they could charge for this model.

His work with the HP-92 starts on page 149 of the following interview from 2005.
Interview with Dr. William Kahan - August 2005

[EdS2]

(06-15-2022 12:51 AM)Steve Simpkin Wrote:  As a side note, Dr. William Kahan worked on some of the financial algorithms for the HP-27, HP-92 and HP-12C. He had a lot to say about how well the HP-92 worked. He also strongly disagreed with the initial price that marketing decided they could charge for this model.

His work with the HP-92 starts on page 149 of the following interview from 2005.
Interview with Dr. William Kahan - August 2005

That looks like a good read! Also available at The History of Numerical Analysis site.

[Steve Simpkin]

(06-15-2022 06:46 AM)EdS2 Wrote:  

(06-15-2022 12:51 AM)Steve Simpkin Wrote:  As a side note, Dr. William Kahan worked on some of the financial algorithms for the HP-27, HP-92 and HP-12C. He had a lot to say about how well the HP-92 worked. He also strongly disagreed with the initial price that marketing decided they could charge for this model.

His work with the HP-92 starts on page 149 of the following interview from 2005.
Interview with Dr. William Kahan - August 2005

That looks like a good read! Also available at The History of Numerical Analysis site.

I used to post that address for the Dr Kahan 2005 interview but for some reason not everyone can access that site. I can always access that site but I know there are at least several people that can’t.

[EdS2]

Ah! An unexpected bump in the road - my second port of call is usually to use the Internet Archive's Wayback Machine as a sort of proxy:

Code:

add this prefix
https://web.archive.org/web/*/
to this url
http://history.siam.org/oralhistories/kahan.htm
and get this
https://web.archive.org/web/*/http://history.siam.org/oralhistories/kahan.htm

which should resolve to here.

[BliztT]

Thanks to all who have responded with the very helpful information here!