A computer program product comprises computer-readable instructions that cause a computer to function as: a command transmission request receiving unit which receives a command transmission request issued by each information processing unit of an information processing device which includes a plurality of information processing units executing information processing based on device information as information on a device; a command transmitting unit which transmits a command corresponding to the command transmission request received by the command transmission request receiving unit to the device via an interface; a device information acquiring unit which acquires the device information supplied from the device as a response to the command; and a device information supplying unit which is configured to supply the device information acquired by the device information acquiring unit to the information processing units as needed.