Abstract: An image forming apparatus removably having an operation panel having a display unit, an imaging unit and a wireless communication unit communicable with the image forming apparatus. In a status where the operation panel is not mounted on the image forming apparatus, an image indicating an operation method is combined with a video image obtained by the imaging unit and displayed on the display unit, and the combined image is displayed.

Abstract: In an information processing apparatus in which data processing is performed in a predetermined sequence by processing modules connected to a ring bus, if an amount of data generated by input data in the ring bus is not considered, the data amount exceeds an amount of data that can be held by the processing modules on the ring bus, and a data collision often occurs, so that processing efficiency of the ring bus deteriorates. An amount of data input into the ring bus is controlled so that the total sum of data amounts output to the ring bus from processing units used for processing does not exceed a maximum amount of data that can be held by the processing modules on the ring bus.