Wow! A very interesting story about the Curta Mechanic Calculator, developed in a concentration camp – the inventor survived WWII and was liberated when the Allies came through, and a video clip showing how it works.
In high school I had several slide rules, and could use them, but I never heard of the Curta until about 2 years ago. A marvelous toy! Wish I had one. Maybe it’s on to ebay next to see whether there are any there…..
Oh, the Babbage Laptop reference? That’s the is what a Curta basically is, a Babbage Difference Engine in miniature, hand held size instead of desk size.