Abstract: A digital copying machine that performs transfer of image data from the image reader to an external computer based on an image reading operation, as well as transfer of image data from the external computer to the printing unit based on a printing operation using the same bus, wherein the image reading operation and the printing operation are performed simultaneously by alternating the two types of transfers in response to the signal, based on the operation timing of the printing unit.

Abstract: An object of the present invention is to provide an image forming apparatus which can reduce the burdensome operation of installing a printer driver performed by a supervisor. To attain the object, a printer according to the present invention has the function of transmitting electronic mail to personal computers connected to a network. To the electronic mail, various data for using the printer with each of the personal computers 4A, 4B, and 4C and a printer driver for the printer are attached. Accordingly, the printer driver can be delivered without intervention of the supervisor.

Abstract: A digital copying machine that performs transfer of image data from the image reader to an external computer based on an image reading operation, as well as transfer of image data from the external computer to the printing unit based on a printing operation using the same bus, wherein the image reading operation and the printing operation are performed simultaneously by alternating the two types of transfers in response to the signal, based on the operation timing of the printing unit.