In 1985, the French philosopher Jean-Francois Lyotard curated a groundbreaking exhibition called Les Immateriaux at the Centre Pompidou in Paris. The exhibition showed how telecommunication technologies were beginning to impact every aspect of life. At the same time, it was a material demonstration of what Lyotard called the post-modern condition. This book features a previously unpublished report by Jean-Francois Lyotard on the conception of Les Immateriaux and its relation to postmodernity. Reviewing the historical significance of the exhibition, his text is accompanied by twelve contemporary meditations. The philosophers, art historians, and artists analyse this important moment in the history of media and theory, and reflect on the new material conditions brought about by digital technologies in the last 30 years. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.