A system for tracking and segregating repeated defects on media disks as tabled data in disk drives is disclosed. Each multi-function device may be represented by a multi-function object, allowing tools, applications or other components within the computer to take actions relating to the entire device or relating to a function based on the association of that function with other functions in the same device. The cylinder attachment axis of the ripper cylinder is disposed coaxially with the rotational axis of the pair of ripper links and the pair of tooth brackets. The application content, provided by user or customer, defines functional interactions between the printed content representation and a smart pen. A method for determining the absolute steering angle of a steering wheel is also disclosed. The lens apparatus includes a focus driver which drives a focus lens, a terminal which is a member for communication with the camera.