A data processing device includes a first storing unit for storing a plurality of job definition data indicating content of processing corresponding to instructions in accordance with a series of operations by a user, a second storing unit for storing rule information indicating a rule for determining order of displaying a plurality of items of identification information respectively identifying the plurality of the job definition data, a updating unit for updating the rule information stored in the second storing unit, a control unit for determining the order of displaying the plurality of the items of the identification information in accordance with the rule information stored in the second storing unit, and a displaying unit for displaying the plurality of the items of the identification information in the order determined by the control unit.