This book suggests selected papers presented at the 5th Computer Art Congress: Archiving and Questioning Immateriality. It is interested in reflecting on the artwork as a material object, but also as a complex processes that surround a work of art. The artwork is regarded from the emotional and intellectual effects that it triggers. Contributions were focused on "How should we deal with artworks by taking into account their multidimensional nature: temporal, spatial, communicational, ..? Such entry points have raised problematic issues demanding to interrogate the "Material" supports that give form to an artwork as well as the archival methods and the remix and re-cataloging appropriations.