A disc drive, which inputs and outputs signals by an earphone jack. The second accessory control unit is juxtaposed with the first accessory control unit. A secure execution environment may measure usage in accordance with the business model as well as monitor and enforce compliance to the operating policy. In this manner, the cross-sectional area of the cooling passage with the plate in the slot is smaller than the cross-sectional area when the regulating plate is not provided by an area corresponding to the cross-sectional area of the regulating plate. A gate pad, a data pad, and a common electrode pad electrically are connected to each of the gate lines, data lines, and common electrodes respectively. The system employs a smartphone application coupled with a central server that computes driver safety scores which relate time of day, road type, vehicle speed, vehicle acceleration and distracted driving using the Cauchy distribution equation.