Teaching an Almost 40-year Old UNIX about Backspace
https://virtuallyfun.com/2018/01/17/teaching_an_almost_40-year_old_unix_about_backspace/ [virtuallyfun.com]
2018-02-04 03:36
There seem to be multiple different definitions of backspace. V7 does not accept either for input by default. Instead, # is used as the erase character and @ is used as the kill character. These defaults have been there since UNIX V1. In fact, they have been “there” since Multics, where they got chosen seemingly arbitrarily.
source: L