Online, non-downloadable software for controlling the selection and playback of music, sound or video; non-downloadable software for managing systems for the playback of music, sound or video; online, non-downloadable software enabling users to create individual music playlists; online, non-downloadable software that allows users to select and control the music played at bars, restaurants, stores, and other public venues via the Internet; non-downloadable software for programming mobile communications devices to select music, sound or video stored on remote apparatus; provision of technical information about the operation of audio systems, audio-visual systems and juke box systems