A communication device that communicates with a plurality of different target devices compliant with different specifications of data communication. The communication device receives request data to control operations of the plurality of different target devices; identifies a specific target device for which operation is to be controlled among the plurality of different target devices; identifies command content to be performed by the specific target device according to the received request data; identifies a specification of data communication employed by the specific target device; identifies an operation command corresponding to the identified command content based on the identified specification of data communication employed by the specific target device; and sends the operation command to the specific target device.