Minor gripe about being first with RPN but overall an article that brought a smile and warm memory. My first HP calculator was the 25. Loved it but hated losing the program when it was turned off. Bought its CMOS successor, the 25C, as soon as it was released. Had and taught classes on the 12C, unreal ability for its time, not surprised it is still going.
Have had scads of HP’s since, it was an addiction! Still have my 200lx and an HP-Prime along with the ‘i41CX+’ app on my iPad & iPhone.
Are there any other FReepers who have a Curta ‘peppermill’ mechanical calculator out there? Now this is one absolutely amazing piece of equipment, it actually feels good working a calculation!
Has anyone found good Windows PC software that does RPN?
I’ve had a couple of Curtas. Very cool device. I sold both of them at a huge profit.
I currently have a 15C (a Christmas gift from my dad), a 35 and a 45 acquired second hand. I bought a 45 when it first hit the market, but it died.
Curta?
My older brother bought one of those in Lichtenstein from the King. I played around with it a little, but never spent enough time at his house to learn how to use it. Turn the crank & there is your answer.
Had not Bardeen and his Bell Telephone buddies invented solid state electronics, more of these might have been sold.