The document discusses the concepts of remediation and mediation in digital media. It defines remediation as the representation of one medium through another, which Bolter and Grusin argue is a defining characteristic of new digital media. The document then covers topics like perspective in art, the development of photography and film, and how each new medium remediates older forms of representation. It argues that immediacy and hypermediacy are in constant oscillation, as media aim to either conceal or highlight the technological means of representation.