> … *nix systems will still assume that you're on a 5 bit Baudot (uppercase only) teletype … Akshully the original 1963 version of ASCII¹, which was a 7 bit co

> … *nix systems will still assume that you're on a 5 bit Baudot (uppercase only) teletype … Akshully the original 1963 version of ASCII¹, which was a 7 bit code but did not include lower case. The Model 33 teletype² (one of the terminals used by UNIX developers³, and probably a contributing factor to two-character command names) was a 1963-ASCII device. Even after 1967 ASCII added lower case, popular low end video terminals⁴ did not include it so that they could get away with 6 bits worth of printable character ROM. ¹ http://worldpowersystems.com/archives/codes/X3.4-1963/index.html http://worldpowersystems.com/archives/codes/X3.4-1963/index.... ² https://en.wikipedia.org/wiki/Teletype_Model_33 https://en.wikipedia.org/wiki/Teletype_Model_33 ³ https://commons.wikimedia.org/wiki/File:Ken_Thompson_(sitting)_and_Dennis_Ritchie_at_PDP-11_(2876612463).jpg https://commons.wikimedia.org/wiki/File:Ken_Thompson_(sittin... ⁴ https://en.wikipedia.org/wiki/ADM-3A https://en.wikipedia.org/wiki/ADM-3A