Typesetting once literally meant the setting of type, that is, the arrangement by hand or machine of narrow slugs of metal, usually lead, bearing on their ends the raised images of individual characters. A readable text was produced when the set type was inked and pressed against paper. Today, however, the term typesetting often refers to computer methods for producing a printer-ready image of a document: that is, an image of the document exactly as it is supposed to look on paper. Here the word printer refers not to a desktop printer but to an industrial workshop that can produce a journal, bound book, or other printed object of professional quality. Printers no longer rely on moveable metal type to put ink on paper, but on flexible sheets of metal on which text and graphics have been produced as a raised pattern by photoresist techniques. These metal...