A data recording apparatus includes a surface having a plurality of data tracks with leading track portions. First suspension assembly on vehicle is pivotally mounted to platform in order to dispose and couple first ground surface contacting member spaced in first direction from platform, movable to follow the ground surface, vertically movable relative to platform to accommodate impact generated by uneven ground surface, and steerable horizontally relative to platform and the ground surface. The index is based on a quantization parameter, a size of the block of coefficients, and a position of said each coefficient within the block. The second category constitutes that information which is specific to one instance of the application which provides a service. When accumulated amounts reach or exceed, quantized deliverable amounts, infusion is made to occur. Alternatively, the complex may be included in the fluorescent material as a thin film.