An abnormality determination apparatus and method for a blow-by gas feedback device, and an engine control unit are provided for improving the accuracy of abnormality determination even when an intake air amount controller is provided in an intake system at a location downstream of a joint of a blow-by gas passage. In a communication system, an electric appliance, a server apparatus and a mobile terminal each detect a failure in preparation for P2P connection between the electric appliance and the mobile terminal. The n first switches simultaneously transfer the n-bit data prefetched into the first latches to n nodes in response to a CAS latency information signal. Each compartmentalized process module is sized to receive a substrate on which the device is to be fabricated and is configured to aid in fabrication of the device. A network controller of the first intercom unit may wirelessly transmit the data last encoded by the encoder during the repeated time interval to the one or more second intercom units.