A revised family tree


I developed a familiy tree for the machines and I would like to share the idea with our friends in The Museum. The
diagram was prepared based on the one available in Craig Finseth's site with added information taken from The Journal and other sources. There is a lot of personal opinion, like the idea that the whole thing started with
the HP-35 model. You can see it at:


As for the "instantaneous" development suggested by the vertical lines, they are mostly due to HP company information that some models were released in the first months of a certain year while some other models were available only later in the same year. They also represent models that belong in the same group of development, as far as the available information is concerned.

Anyway, I think the diagram shows very clearly the impetus that once drove HP company which is one of the reasons why we are so deeply involved with their products. Hence the big title I gave the diagram.

I'm trying to improve the vertical dimension as to make the diagram more complete and easy to understand.


Nice work!

Hmm. Since you included the 9815,
which is hardly a handheld device,
wouldn't it be more complete to include the 9100 series, too?

And on the right end of the line, there are the 'FHB' models missing, since you included the 10BII;-)

But of course the title 'Real roaring 20's' says it all.
From this aspect you're perfectly right.



I noticed there is a "32C" in the diagram. I don't think there ever was an HP-32C. Or is this an unreleased prototype?


This is great! I have one question: how does the 16C contribute or lead to the 28C?

Possibly Related Threads...
Thread Author Replies Views Last Post
  HP-10C Series Family Photo Max Stone 5 1,356 10-24-2013, 10:31 PM
Last Post: Eddie W. Shore
  Christmas tree simulator on HP39gII Mic 0 584 12-08-2012, 07:19 AM
Last Post: Mic
  DM-15CC family is available to order Jeff Johnson 35 4,824 07-07-2012, 05:20 AM
Last Post: Pascal
  WP 34S: IR plotting (revised) Marcus von Cube, Germany 41 5,876 06-12-2012, 05:13 PM
Last Post: Walter B
  The Family Tree Matt Agajanian 8 1,311 04-01-2012, 03:33 AM
Last Post: aurelio
  48GX Erable etc ever to be updated /revised etc? mr-scorpio 9 1,420 09-27-2011, 04:33 AM
Last Post: mr-scorpio
  Function Tree for HP48/et al. Thomas Chrapkiewicz 3 770 10-08-2010, 03:52 PM
Last Post: Jean-Michel
  HP 41 Family Service Manuals Gerry Schultz 4 1,059 05-20-2010, 02:10 PM
Last Post: Gerry Schultz
  HP-12C family Antonio Maschio (Italy) 2 621 11-29-2007, 02:22 AM
Last Post: Antonio Maschio (Italy)
  Fast and Accurate Trigs (HP-12C Platinum) - Revised version. Gerson W. Barbosa 9 1,579 12-05-2006, 06:10 PM
Last Post: Gerson W. Barbosa

Forum Jump: