A relaying device may be configured to communicate with an image processing device via a network. The relaying device may identify a data process as a selected data process in accordance with the process identification information received from the image processing device. The relaying device may receive, from the image processing device, process identification information for identifying a selected data process. The selected data process being executed on output data outputted from the image processing device. The relaying device may identify a selected instruction-module from among a plurality of instruction-modules. The relaying device may execute the selected instruction-module so as to execute the selected data process on the output data. The relaying device may transmit processed data created by the selected instruction-module to the image processing device. The relaying device may cause the image processing device to execute a printing process based on the processed data.