Abstract: The display device allows easily operating plural controlled devices connected to a network. The display device includes a communication unit communicating with controlled devices X1 through Xn connected to a network; an information acquiring unit acquiring operation-related information from controlled devices X1 through Xn through the communication unit; an information classifying unit classifying URL information into plural function groups based on operation information contained in operation-related information; a menu generating unit generating a menu page for each of the function groups; a display unit displaying the menu page generated by the menu generating unit; and a page operation unit operating the menu page.

Abstract: The display device allows easily operating plural controlled devices connected to a network. The display device includes a communication unit communicating with controlled devices X1 through Xn connected to a network; an information acquiring unit acquiring operation-related information from controlled devices X1 through Xn through the communication unit; an information classifying unit classifying URL information into plural function groups based on operation information contained in operation-related information; a menu generating unit generating a menu page for each of the function groups; a display unit displaying the menu page generated by the menu generating unit; and a page operation unit operating the menu page.

Abstract: A bar code reader has a CCD for producing an image signal, an amplifier for amplifying the image signal from the CCD and a digitalizing circuit for changing the image signal to binary signal. The CCD operates with an operating voltage Vcc less than 8 V. The amplifier has first and second operational amplifiers each having one voltage source terminal connected to Vcc of 5 V and the other voltage source terminal connected to ground. Also, the digitalizing circuit has a third operational amplifier having one voltage source terminal connected to Vcc of 5 V and the other voltage source terminal connected to ground.