According to one embodiment, a memory module includes a substrate, a semiconductor memory device, a plate-form conductive member, wire, and a mold member. or higher in an atmosphere including at least one reactive gas component prone to form a reaction product with an element that may or may not be present in the one or more bodies. A signal demultiplexer is operatively positioned relative to the input optical connector so that optical signals passing into the selector assembly are demultiplexed by the demultiplexer into signal components, each signal component having a respective signal component beam path. The user device periodically requests these commands from the server. A joint is installed that integrally connects the two split molds to their parting surface and that is composed of a taper pin and a socket for preventing the shifting of the parting line. The adjust mechanism can adjust the power module relative to the connector.