If someone could comment on https://retrocomputing.stackexchange.com/a/28146 https://retrocomputing.stackexchange.com/a/28146, the comment by Solomon Slow is al

If someone could comment on https://retrocomputing.stackexchange.com/a/28146 https://retrocomputing.stackexchange.com/a/28146, the comment by Solomon Slow is almost right. The detailed history can be found in https://www.redhat.com/sysadmin/unix-linux-history https://www.redhat.com/sysadmin/unix-linux-history. In short, Unix was initially developed as an experiment in operating system design. But the investment of buying a PDP-11 to port it to was justified on the promise of creating a typesetting system for patent applications. And so it needed both upper and lower case early in its history. Since most English text is lower case, that was a sensible default to use.