Patent ID: 7941811

Claim:
A data processing device, comprising: a processing unit; a memory; a notified party storage unit configured to store a notified party which is notified of information related to the data processing device; a notification unit configured to notify each notified party stored in the notified party storage unit, of the information related to the data processing device; a reception unit configured to receive from a plurality of information processing devices a registration request with which registration of the notified party to the notified party storage unit is requested; and a setting unit configured to set at least one of the plurality of information processing devices as a specific information processing device, wherein the notified party storage unit stores the notified party such that the number of the notified parties registered in accordance with the registration request from information processing device that is not the specific information processing device does not exceed a predetermined number among the number of the notified parties that can be stored in the notified party storage unit, wherein the notified party storage unit has a first area for storing the notified party registered in accordance with the registration request from the specific information processing device and a second area for storing the notified party registered in accordance with the registration request from an information processing device that is not the specific information processing device, and the notified party specified in the registration request from the specific information processing device can be stored in the second area but the notified party specified in the registration request from the information processing device that is not the specific information processing device cannot be stored in the first area.