PETSCII-works by Adrien Tison.
Computer – Come and Dance (1977). ASCII art in the disco era. Includes the hit Nobody loves a computer because a computer does not dance. h/t: David Viens.
Acid logo by Cleaner, 1999.
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.