telecommunications services, namely, transmission of voice, data, documents, and images by satellite; audio and video teleconferencing; telephone communications services; electronic transmission of data, documents, voice and images via computer terminals; messaging, namely, the recording, storage and subsequent transmission of voice messages by telephone; mobile radio communications; cellular telephone services; cable radio broadcasting; cable television broadcasting; cable radio transmission; cable television transmission; teletext services, electronic mail services; videotext services; facsimile transmission