A fuel cell system includes a fuel cell that supplies an oxidizer containing oxygen to a positive electrode, supplies a fuel gas containing hydrogen to a negative electrode and generates power, a battery containing at least water as an electrolyte, a hydrogen tank that stores hydrogen generated from the battery and a hydrogen pipe that supplies hydrogen in the hydrogen tank to the fuel cell. In a single layer medium, the magnetic layer comprises a ferromagnetic powder dispersed in a binder, and a surface modifier comprising a low molecular weight azo dye. The notification includes information about the condition in the first part of the circuit, the condition preventing a response to the transaction from being received by the initiator. A data processing part performs data processing so as to cause all frames included in the received Web data to be displayed on the display part when it is judged that the changes took place in the display contents. The methods generally involve the use of dispersions comprising a fluoropolymer.