We take for granted that computers use binary: to represent numbers, letters, or more complicated things like music and pictures…any kind of information.
That was something Ada Lovelace realised very early on. Binary wasn’t invented for computers though. Its first modern use as a way to represent letters was actually invented in the first half of the 19th century. It is still used today: Braille.
https://cs4fn.blog/2021/11/22/braille-computer-science-history-cs4fn/
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