If a network having the same SSID as but a different BSSID from those of a network that has been established by a first communication apparatus is detected, the network established by the first communication apparatus is terminated and the first communication apparatus participates in the detected network. The array having aberrated elements can be replicated for use in the manufacture of a tool, and the tool can be used in the manufacture of retroreflective products of broader divergence. The progressive jackpot pool may include a main pool and a reserve pool. A recordingreproducing apparatus to record extended part version information on a reserved zone of a physical format information zone of a recording medium. An evaluation unit determines a map of temperature increase caused by the heating light beam inside the object based on apparent displacements showing up between the second and first pulse echoes.