An operating system for an electronic apparatus is provided. When a user validation portion validates that a person is present adjacent to an electronic apparatus, the electronic apparatus generates an identification code, converts the identification code to a QR code, and displays the QR code on an identification code display portion. When the QR code that has been displayed has been inputted with an identification code input portion to allow an operation portion to assign operation for the electronic apparatus, an operation portion transmits operation information that indicates the operation that has been assigned and the identification code to which the QR code that has been inputted has been decoded. When the identification code that has been received by the electronic apparatus corresponds to the identification code that has been displayed thereon, the electronic apparatus executes the process according to the operation indicated by the operation information that has been received thereby.