Abstract: A demand response (DR) system includes a DR control unit to generate different DR levels having different power rates for each power unit, and transmit a current DR level, and a household appliance to receive the DR level from the DR control unit, and differentially control energy output of a product in response to the received DR level so as to reduce power consumption of the product. As a result, the DR system reduces power consumption when power rates are high so as to reduce electricity bills.

Abstract: A demand response (DR) system includes a DR control unit to generate different DR levels having different power rates for each power unit, and transmit a current DR level, and a household appliance to receive the DR level from the DR control unit, and differentially control energy output of a product in response to the received DR level so as to reduce power consumption of the product. As a result, the DR system reduces power consumption when power rates are high so as to reduce electricity bills.

Abstract: A demand response (DR) system includes a DR control unit to generate different DR levels having different power rates for each power unit, and transmit a current DR level, and a household appliance to receive the DR level from the DR control unit, and differentially control energy output of a product in response to the received DR level so as to reduce power consumption of the product. As a result, the DR system reduces power consumption when power rates are high so as to reduce electricity bills.

Abstract: Disclosed herein are a display device capable of preventing a buyer from arbitrarily switching a demo mode or a function control mode in an exhibition room, and a household appliance including the same. The household appliance includes a main body and a control device provided in the main body to control at least one function of the appliance, and at least one of a first display device electrically connected to the control device to display an operation state of the appliance controlled by the control device and a second display device to perform a demo function of the appliance is selectively mounted.

Abstract: A computer system comprises a main casing, a guide part shaped like an elongated hole and formed along an up and down direction on the main casing, and a port unit slidingly engaging the guide part. The port unit has at least one port to which an external device can be connected. With this configuration, a computer system has a port unit with a port that can slide up and down in the main casing of the computer, so that a position of the port can be changed as desired.

Abstract: A computer system comprises a main casing, a guide part shaped like an elongated hole and formed along an up and down direction on the main casing, and a port unit slidingly engaging the guide part. The port unit has at least one port to which an external device can be connected. With this configuration, a computer system has a port unit with a port that can slide up and down in the main casing of the computer, so that a position of the port can be changed as desired.