A paper that is both a text and an executable program that plays music. Made by Tom 7 in his custom C compiler. More info here.
Hypnotist by an unknown artist.
Frederick Hammersley, A Good Line is Hard to Beat, 1969, L. A. Louver, Venice, CA / Frederick Hammersley Foundation
ASCII art by Frederick Hammersley, 1969. Made on an IBM-computer (which used EBCDIC and not ASCII encoding), and:
The alphanumeric characters we could ‘draw’ with were: the alphabet, ten numerals and eleven symbols, such as periods, dashes, slashes, etc….
h/t: Robert Doerfler
Portrait en creux de Georges Perec by Étienne Lécroart. Oulipo work with the following constraint according to Google Translate:
Text of a page describing a person and drawing a portrait of it by the whites of the text: between the words and at the end of lines. The text will preferably be in the negative form and composed in a fixed hunting font.