stills leaves the issue of how to print out something that doesn't exist as a physical old style physical type face character. (way pre-dot matrix / laster printer stuff). -- aka substituting 3 characters way more informative than blank space.

EBCDIC is very much IBM - on our old Burroughs machine we used to have to use cent signs (and something else that I forget) for square brackets and a 3-hole multipunch for ';'

In the "Swedish 7-bit ASCII", the C code "a || b" would look like "a öö b". The same character mappings were used in Finland, and that's why IRC count the characters {|}[\] as letters (that would typically have been displayed as "äöåÄÖÅ").

On the Compis II computer (a CP/M machine built on the 80186 CPU), there were places for {|}[\] in the character set, but they were in the top half of the 8-bit characters and not generally useful for programming.