Abstract: A data card includes an apparatus body, a plug, and a cap, where the cap is disposed with a mouse module and a mouse power supply, and the apparatus body is disposed with a receiving module. The mouse module is configured to sense and calculate a moving distance of a spatial position of the cap, convert the calculated moving distance of the spatial position of the cap into an instruction for moving computer cursor position, and send the instruction for moving the computer cursor position to the receiving module; the receiving module is electrically connected to the plug and is configured to receive the instruction for moving the computer cursor position, input the instruction for moving the computer cursor position into a chip of a computer through the plug and a slot, and control a position of a cursor on a computer screen through the chip of the computer.

Abstract: A communication device is provided, which has a PCI Express interface and includes: an interface circuit board, configured to bear the PCI Express interface; a main circuit board, connected to the interface circuit board through soft link, and configured to transmit/receive and process data of the PCI Express interface; a guide rail, configured to bear the main circuit board, so that the main circuit board slides between a use position and an accommodation position through the guide rail; and an antenna, installed on the main circuit board, and located at different positions with the movement of the main circuit board. According to an embodiment of this invention, the antenna in the main circuit can be exposed out of a case of the communication device, or accommodated into the case of the communication device, thus being convenient for the storage and transportation of the communication device.

Abstract: A modem includes a modulation/demodulation function module, a hub function module, and at least one storage module. The storage module and the modulation/demodulation function module are connected to the hub function module, respectively. By adding one or more storage modules in to the modem, the invention enables mass storage of data to be provided at the modem, and thereby provides convenience to the user.