Nothing at all to do with string theory (Hamiltonian reference string). One /could/ potentially consider ASCII code points (https://en.wikipedia.org/wiki/Ascii

Nothing at all to do with string theory (Hamiltonian reference string). One /could/ potentially consider ASCII code points (https://en.wikipedia.org/wiki/Ascii https://en.wikipedia.org/wiki/Ascii) as a form of typed godel numbers, but it is very doubtful anyone on the committe in the 60's when ASCII was developed was thinking of "typed godel numbers". As far as early languages that had a "CHR" function "CHR" was simply an abbreviation for "character", because the function returned the "character" (as a string type) that was represented by the integer argument: https://qbasic.com/documentation/CHR$.html https://qbasic.com/documentation/CHR$.html