In Gödel, Escher, Bach: an Eternal Golden Braid, published 1979, Douglas Hofstadter uses the acronym GOD, 'GOD Over Djinn'. As a genie explains to Achilles, GOD stands for GOD Over Djinn, remarking that "GOD can never be fully expanded." In the German translation it is rendered as "ZEUS ewig über Schinn", meaning "Zeus eternally over Djinn".

• The GNU Hurd project is named with a mutually recursive acronym: "Hurd" stands for "Hird of Unix-Replacing Daemons", and "Hird" stands for "Hurd of Interfaces Representing Depth."

• The GNUBrain project is another mutually recursive acronym: "Brain" stands for "Brian relates any independent node" and "Brian" stands for "Brain implements a network".

Recursive acronym