You are saying that ... in the days of punched cards ... there was an EBCDIC code whose meaning was LOGICAL NOT. So far so good - but how would such a character code have been /written/? Was it written like the U+00AC glyph is now?
Yes, exactly the same.
It appeared in original EBCDIC in 1964. See http://homepages.cwi.nl/~dik/english/codes/stand.html#ebcdic
It appeared on IBM mainframe terminal keyboards. It still appears on terminals in an EBCDIC environment.
Jim Allan
