A new book about the history of the pocket calculator

[jonmoore]

Paul's point was with regard specifically to hand held calculation devices. To date, there's no evidence of a manufactured hand held device being available in the lead up to Hiroshima and Nagasaki, but there was a design (the Curta) which wasn't built until after the end of the Second World War.

I do, however, agree that the author is likely to discuss all manner of electro-mechanical calculation devices of the 20th century that eventually led to HP's introduction of the HP-35.