Abstract: A portable digital music playback device integrates a digital music walkman connection interface, a power supply unit, a data transmission interface and a multi-channel loudspeaker together. The portable digital music playback device is used to connect a digital music walkman, to play music, to transmit data, and to perform charging actions. Through a multi-channel design, a better sound quality of played music can be achieved. Moreover, because several transmission interfaces are integrated together, more convenient operations can be accomplished for users.

Abstract: Techniques are described relating to the aggregation and use of local retail information for the purpose of providing a wide variety of valuable services to consumers and retailers.

Abstract: Techniques are described relating to the aggregation and use of local retail information for the purpose of providing a wide variety of valuable services to consumers and retailers.

Abstract: Techniques are described relating to the aggregation and use of local retail information for the purpose of providing a wide variety of valuable services to consumers and retailers.

Abstract: A pressurized container-dispenser characterized by a separate pressure source chamber containing a gas-adsorbent solid and an adsorbable gas and having means to transmit source chamber pressure to a product chamber for dispensing of a product therefrom. Preferred transmission means include a moveable wall separating the product and source chambers, a check valve, a constant pressure valve, and a membrane of the type allowing passage of gas but resisting passage of non-gaseous fluid. In a preferred embodiment the source chamber is defined by an enclosure of substantially fixed volume secured adjacent the product chamber. In another, the source chamber is defined by an unsupported enclosure free within the product chamber.