Abstract: A vehicle on-board device includes a user interface device and a processing section. The user interface device is mounted inside of a vehicle, and configured and arranged to output information to a user and to receive a user input. The processing section is operatively coupled to the user interface device, and configured to perform a prescribed function in response to a prescribed user operation received by the user input interface device. The processing section is further configured to perform an interactive tutorial control to provide the user with at least one interactive instruction for the prescribed function in which the processing section prompts the user to input the prescribed user operation, determines whether the user input received by the user interface device matches the prescribed user operation, and completes the interactive learning control when the user input matches the prescribed user operation.