Abstract: Two systems each having an audio signal output unit are docked together, and audio signals are controlled in accordance with the characteristics of each system to thereby output sounds of good quality. If sounds are output from the two systems at the same time, the frequency band or sound volume of the audio signal is controlled in accordance with the characteristics of each speaker to thereby output sounds easy to listen.

Abstract: A housing of an electronic apparatus such as an information processing apparatus has a first board has arranged in a casing and has a first connector, and a second board with a second connector adapted to be fitted to the first connector. The second connector forms at least a part of the casing and is fixed to a conductive cover that is detachable from the casing. A heat generating member is detachably attached to the second board. The cover can be made of a metal in contact with the heat generating member through a heat conduction elastomer.

Abstract: The invention aims at providing a notebook type personal computer having an improved portability. In order to achieve this object, a battery, case which houses a battery B for supplying a power to a personal computer body is detachably attached to a housing. The battery case has such a shape that it also serves as a palm rest used when a keyboard is operated. The battery case has a battery case body for housing the battery B, and an attaching/detaching portion connected to the battery case body and attached to and detached from the housing. The battery case body is connected to the attaching/detaching portion to be pivotal in a direction of thickness of the housing.