According to a gaming system of the present invention, the control device cumulatively counts a part of the number of game media betted in each of the slot machines, as a cumulative value, and transmits cumulative-value information based on the cumulative value obtained by the counting to the slot machines. More specifically, optical stacks including a lightguide, a light extraction layer having first and second regions, and a polymer dispersed liquid crystal layer having third and fourth regions are described. In response, the control logic automatically sets a mode of operation requiring a subset of the parallel processing capacity. This ring is split into several parts to facilitate the assembly of the bulkhead made of composite material to the fuselage skin.