In popular discussion digitality is increasingly equated with networked immateriality: disembodied algorithms float rhetorically in an ethereal cloud of big data. Think, for example, of the “digital edition” of the PlayStation 5 console, so called because it has no optical drive to read games, which must instead be downloaded. The implication is that the regular PS5 console is somehow not digital because its storage medium is visible to the unaided human eye. This presupposition of digital immateriality is not just a misconception to be corrected, but a productive site for interdisciplinary scholarly inquiry into media and data practices. In Digital Matters, historians, media theorists and information scholars come together for three days to examine the socio-material constituents of digital systems and artifacts. How and why did people come to deny the materiality of the digital? What can we learn by recovering it? What if we rethink digital materialities as ongoing cooperative accomplishments?