Abstract: A portable computer, capable of being powered by a specific rechargeable battery pack or by ordinary batteries, comprises a battery door opening formed in one side of a housing for mounting various electronic devices together with a printed circuit board, and a battery storage casing having a bottom and four side walls and an upper battery insertion opening to store the specific battery pack or ordinary batteries. The battery storage casing is mounted in the housing so as to make the upper battery insertion opening face the battery door opening. The internal space of the battery storage casing is designed to accommodate either the specific rechargeable battery pack or ordinary batteries. Thus, the portable computer may be driven by the specific rechargeable battery pack or one or more ordinary batteries installed in the battery storage casing.

Abstract: A portable computer having a hinge assembly which allows the cover and display screen to be tilted from the base of the portable computer and then swivelled about a vertical axis. The hinge assembly can include a stopper to limit the amount of tilt and swivel. The cover of the portable computer can be tilted backwards from a closed position to 135° and swivelled 182° from a straight-forward position in a clockwise direction.

Abstract: A palm-sized computer comprises a housing for encasing the structure of the palm-sized computer, a frame having a first and a second holding surface mounted in the inside of the housing, a liquid crystal display (LCD) panel held on the first holding surface of the frame to display information retrieved from the palm-sized computer, and a printed circuit board (PCB) held on the second holding surface of the frame to electrically connect various electronic devices. The PCB and LCD panel are supported by the frame in the housing.