When a first device and a first attribute are specified, a data processing device registers the first device in association with first attribute and transmits an instruction to perform a process relating to the first attribute to the first device. If the first device possesses the second attribute, the data processing device registers the first device in association with the second attribute. The data processing device displays, on a display unit, a first image representing identification data of the first device when the second attribute is specified and the first device is registered in association with the second attribute. When the first image is selected, the data processing device transmits an instruction to perform a process relating to the second attribute to the first device corresponding to the selected first image.