Methods and systems for processing a request of changing a first node having a first service connecting with a second node in a network environment are described herein. In some embodiments, two or three dimensional projections spatially represent relationships between search parameters, located along the periphery of the projections and search hits whose significance are represented by position relative to the center of the projection and comparative distance from each of the search parameters. The system also comprises circuitry for producing an amplified signal by amplifying a selected bandwith of signals in response to the volume setting. A main control unit controls the reproduction of video content by the video recording and reproducing processing unit and the continuous reproduction of Web content by the Web content processing unit based on signals input by operations to a single group of operating keys as interpreted by an input conversion table.