I was bored and found a HP-27S

[Steve Simpkin]

(06-29-2021 01:21 AM)Steve Sabin Wrote:  

(06-29-2021 01:13 AM)Eric Rechlin Wrote:  The 32S was indeed Leonardo. The 22S was actually Plato; DaVinci was the 42S.

Thanks for the time you put into those manuals. You can now see them preserved forever here:

Science Student Applications for the HP-22S: https://literature.hpcalc.org/items/1149

Technical Applications for the 27S and 19B: https://literature.hpcalc.org/items/1143

Yes, it's all coming back to me now. But what were the codenames for the 28S and the 27S? Those are escaping me.
...

The code name for the HP-28S was Orlando and the HP-27S was Mentor.

From this site, here are the know code names for the various models.
https://www.hpmuseum.org/collect.htm#series