Abstract: A common socket device for memory cards is a common inserted base with an upper cover to offer a common space for receive a smart media card, a multimedia card, and a secure digital memory card. The common base may be inserted by two or three memory cards without a need of providing two or three kinds of different socket device. Therefore, contact points in the common socket device is reduced substantially, a less volume of the common socket device is obtained comparing to the gross volume of two or three conventional socket devices, and it enhance the convenience for the user.

Abstract: An automatic operation system provides a CPU to detect and record a status of operation for the operated mechanism. As soon as a response is to be output for allowing the operated mechanism to perform a operation, the CPU figures out corresponding responses by way of a statistic analysis based on past record of operation status as a reference for the operator. Thus, an operation is simplified or a response is output automatically so as to allow the operated mechanism processing itself.

Abstract: A joint socket device for memory cards provides a common lower base with an upper covering to offer a common space for receiving a smart media card (SMC), a multimedia card (MMC), a secure digital memory card (SD) and a memory stick (MS). The joint socket device is available for being inserted with four different memory cards without a need of offering four different socket devices so as to save contact points thereof, reduce the size occupied thereof, and facilitate the use thereof, respectively.

Abstract: A joint socket device for memory cards provides a common lower base with an upper covering to offer a common space for receiving a smart media card (SMC), a multimedia card (MMC), a secure digital memory card (SD) and a memory stick (MS). The joint socket device is available for being inserted with four different memory cards without a need of offering four different socket devices so as to save contact points thereof, reduce the size occupied thereof, and facilitate the use thereof, respectively.