A mandelbrot fractal calculated and printed as text on an IBM 1401 (1959) by Ken Shirriff. This computer does not use binary numbers and does not use bytes. It also does not use ASCII, but EBCDIC.
These are the keyboard layouts of the APL programming language. It is symbolical rather than lexical, ie: instead of words, you use symbols.
Here’s something different than all those ASCII-conversions… Made 41 years ago. Instead of just using single characters, Sam Harbison printed several text characters on top of eachother to increase the quality. So it sort of relates to those diacriticisms by Glitchr & Mammifero, PLATO emoticons & Goa Brudbilder.
And how about that process?
This is not ASCII – it’s EBCDIC! Developed by IBM in the 1960s, it obviously lost the fight against ASCII, but is actually still in use. By, uhm, IBM.
By Paul Gamble, 2013 – more info
Hypothetical Surface 1 by David R Garson, 1969. Computer prints made with IBM-stuff. Not sure, but it looks like text.