In 1985, the French philosopher Jean-Fran�ois Lyotard curated a groundbreaking exhibition called Les Immat�riaux 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 postmodern condition. This book features a previously unpublished report by Jean-Fran�ois Lyotard on the conception of Les Immat�riaux and its relation to postmodernity. Reviewing the historical signifi cance of the exhibition, his text is accompanied by twelve contemporary meditations. The philosophers, art historians, and artists - among them Bernard Stiegler, Sven-Olov Wallenstein, Anne-Elisabeth Sejten and Jean-Louis Boissier - analyse this important moment in the history of media and theory, and refl ect on the new material conditions brought about by digital technologies in the last 30 years.