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Tiny punch card computer?

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33 minutes ago, VoidPetsBack said:

Although impractical, what if? 2 by Randall Munroe has made me think: would it be possible to make a credit card scanner size device (e.g. a calculator) that read punch cards? 

I don’t see why not. It only needs to be wide enough to fit the card, and long enough to accommodate a row of the holes, and read the rows sequentially 

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OMG !   It's worse than Vietnam ...

I'm starting to have flashbacks of 'typing' Hollerith punch cards, to solve the energy levels of the Helium atom, circa 1978-79.

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