Abstract: The invention provides a mobile telephone, which may be connected to a mobile telephone network, and is able to wirelessly communicate with a portable CD-ROM device. The mobile telephone of the invention may access an application program on a disk in the portable CD-ROM device, and further receive an access code from the mobile telephone network for comparing the access code to a SIM card in the mobile telephone to decide if the program is available for use.

Abstract: A data synchronization system includes a first memory device in a handheld electronic device, a second memory device in a desktop computer, and a synchronization program installed in the desktop computer. The handheld electronic device includes a first data block. The desktop computer includes a second data block. First and second data formats of first and second data stored in the first and second data blocks respectively include a common format section. The first and second memory devices store first and second modification records of the first and second data blocks, respectively. The synchronization program updates the first and second data blocks according to the first and second modification records and transmits only the contents of the common format section when transmitting the first or second data between the handheld electronic device and the desktop computer. A data synchronization method implemented in the system is also disclosed.

Abstract: A portable optical disk player utilizes an optical disk to provide a language-learning function. The optical disk player comprises a processor, an optical disk reading device, a screen, a keyboard and an audio output device. The screen is mounted on the front surface of the portable optical disk player, whereas the cover for accessing the optical disk is mounted on the rear surface of the portable optical disk player. For the purpose of learning a language, a user can input commands or data to the processor, and then textual or image information is displayed on the screen. Audio information can be output through an audio output device.

Abstract: A decomposable ROM image sequentially including an OS header corresponding to an OS image, the OS image, a non-OS header corresponding to a non-OS image and the non-OS image. To compose the decomposable ROM image, the OS header, which includes OS size information of the OS image and the non-OS header, which includes non-OS size information of the non-OS image are created first. Then, the OS header, the OS image, the non-OS header and the non-OS image are sequentially combined. To decompose the decomposable ROM image, the OS image is retrieved from the ROM image according to the OS size information obtained from the OS header. The non-OS image is then retrieved from the ROM image according to the non-OS size information obtained from the non-OS header.

Abstract: A data synchronization system includes a first memory device in a handheld electronic device, a second memory device in a desktop computer, and a synchronization program installed in the desktop computer. The handheld electronic device includes a first data block. The desktop computer includes a second data block. First and second data formats of first and second data stored in the first and second data blocks respectively include a common format section. The first and second memory devices store first and second modification records of the first and second data blocks, respectively. The synchronization program updates the first and second data blocks according to the first and second modification records and transmits only the contents of the common format section when transmitting the first or second data between the handheld electronic device and the desktop computer. A data synchronization method implemented in the system is also disclosed.