Thomas Arithometer
1820. This is the first mass-produced calculator that could add, subtract, multiply and divide. Numbers were input with all of the little knobs and dials and then the handle was twisted to perform the calculation. Cool stuff.

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1820. This is the first mass-produced calculator that could add, subtract, multiply and divide. Numbers were input with all of the little knobs and dials and then the handle was twisted to perform the calculation. Cool stuff.

We just got back now from our trip to Cape Cod to visit Bobby and Judit. Spent time at the beach, Nantucket, and more. Will post pictures when I get a chance. We are still unpacking, traveling with a baby is more involved than when it was just us!

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