Abstract: A memory system includes: a first wiring board having first and second interconnections and a first side surface; a second wiring board having third and fourth interconnections and a second side surface; first and second projecting parts each provided at one of the first and second side surfaces; first and second recessed parts each provided at the other of the first and second side surfaces; and a memory and a memory controller mounted on the first and second wiring boards, respectively. The first and second projecting part are connected to one of the first and third interconnections and one of the second and fourth interconnections, respectively. The first and second recessed parts is connected to the other of the first and third interconnections and the other of the second and fourth interconnections, respectively. The first projecting part is engaged with the first recessed part to electrically connect the memory to the memory controller via the first and third interconnections.

Abstract: The distress call emitting device comprises an earthquake sensor for detecting an earthquake of a prescribed intensity or greater and/or a receiver for receiving a radio signal from a remote transmitter. Therefore, even when the user is unable to call for a help, the distress call emitting device of the present invention produces a distress call in his behalf by sound and/or light. The distress call can be initiated either by detecting the intensity of the earthquake or by operating a remote transmitter which may be carried by the user. If the device is linked to a telephone line, the distress call can be made also through a telephone line. Thus, even when the user is too weak to call for a help by his own effort, the device is either automatically activated by an earthquake or remotely activated by pressing a switch on a portable transmitter.