A new family tree for HP calculators


Hello, friends

I prepared a reviewed version of my family tree of HP calculators. It is available in PDF format at


I included all comments made by the friends at The Museum. So, if you have any comments, please let me know. (What do you think of it, Luiz ?)

Right now I have 27 different models in my collection plus 3 noncalculators (HP71B, HP75D and HP85). All these calculators in my collection but 4 are operating and in pretty good condition.


Very nice! Hm... not my intention to be picky, but isn't the HP42S a descendent of the HP41CV rather than the HP41CX?

Regards, Erik

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