Nonvolatile memory devices are provided and methods of manufacturing such devices. The server automatically analyzes the less detailed data to detect an anomaly. The bottom surface of the battery pack includes a discriminating recess formed in the bottom surface and control recesses formed at the intersection of its bottom and front surfaces. The requesting participant may be, for example, any one of the three or more participants. The angle utilized may be dependent upon the shape and extent of engagement of the hub engagement and stop structure. Each of the transform units corresponds to a corresponding one of leaf nodes in the tree structure.