The Machine is its notional class of symbols that consists of its abstract set of text materials. The Writing Machine, as we may put it, is the ideal 'apparatus' that may be accepted as a machine that comprises its actions and that may be made - or not.
Such a machine, as we may reckon it, is the hypothetical 'symbol shifter' that may be agreed to be a machine that comprises its symbols and made as a sort of gadget or not. The Machine is its ideal typology of performances that consists of its ideal typology of text materials.
See also Inscription,