Abstract: The present invention relates to a computer including a first output port, a first video signal generator to generate a first video signal having a predetermined format, a second video signal generator detachably connected to the computer and to generate a second video signal having the same format as the first video signal; and an output selector to output at least one of the first video signal and/or the second video signal through the first output port when the second video signal generator is connected to the computer. Thus, the present invention provides a computer with a low profile graphic card, which enables implementation of a dual monitor and promotes space utilization of a motherboard.

Abstract: A computer system having at least one connection port to which an audio apparatus is connected and a plurality of audio circuit parts operating according to a type of the audio apparatus. The type of the audio apparatus can be selected to connect an audio circuit part, which cooperates with the selected audio apparatus type and one of the connection ports to each other. A sound card functions even though an audio apparatus is connected to any one of the sound card connection ports.

Abstract: A scroll-type compressor has a scroll plate that is prevented from moving radially or rotating but may be axially displaced. The configuration includes a key and key way configuration and springs to axially bias one scroll plate away from the other scroll plate. The major components of the compressor assembly can be axially assembled.