摘要:
An image forming system enabling a cost reduction by decreasing the number of components and having enough performance levels of individual postprocessing functions, comprising: an image forming apparatus body (A) and at least one postprocessing unit (B), the postprocessing unit (B) selectable from a plurality of types of postprocessing units, wherein a single-sheet processing machine is provided as one of the plurality of types of postprocessing units and wherein the single-sheet processing machine has a plurality of types of single-sheet processing functions (40,60) for postprocessing in units of a sheet and a sheet attachment function of attaching a cover sheet or an insert sheet to an output sheet bulk.