An electronic device comprises a display and an ephemeral message controller to present on the display an ephemeral message for a transitory period of time. Related apparatus and methods are also described. When the access point determines that the quality is degrading, or when the access point determines that its traffic is excessive, or when another switch-triggering event occurs, the access point sends a transfer-request to other access points in its vicinity. This information is reported via fuel sensor transponder to a fuel accounting system that tracks the fuel consumption of the fuel consuming system and provides billing information based on the detected fuel consumption. The first stacked body includes first semiconductor layers and first insulating layers alternately stacked. The replacement color candidates are determined in accordance with the boundary strength of the pixel calculated by the boundary strength calculating unit.