By about the year 2000 prepress became, for all printing processes except traditional letterpress, an entirely digital process. Prepress entails the processes and procedures that occur between the procurement of a manuscript and original artwork, and the manufacture of a printing plate, image carrier, or, in letterpress, forme, ready for mounting on a printing press.
When a photopolymer printing plate replaces the forme in letterpress that prepress may also be considered a digital process.