Disclosed herein is a disc brake which may improve restoration of a piston which occurs when braking operation is terminated. Recording density scale factor is denoted by n and recording start address is denoted by m. During operation, the user configures a scroll suppression manager to discard a particular number of scroll commands when the user moves the computer mouse’s scroll ring. A communication service is established between the service provider entity and the subscriber device allowing for the mutual authentication of the subscriber device and the service provider entity.