Enter tap code, most often used by prisoners to communicate between cells. Row a... | Hacker News

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		praptak on Oct 17, 2022 \| parent \| context \| favorite \| on: Koch method to learn Morse Enter tap code, most often used by prisoners to communicate between cells. Row and column in a 5x5 table of chars, encoded by series of taps.

ddingus on Oct 17, 2022 [–]

I did not know about this code. Just looked it up. Clever.

Does anyone know why C/K are overloaded rather than something like Q/Z?

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