With the discovery of electrical waves the electronic media has increased continuously. Now, the telephone, the telegraph, radios, and television make it possible to rapidly transmit information in large quantities. This has made it possible for today's information network to reach everywhere.
直到發現電波，接著電子媒體日益發達，人們藉著電話、電報、收音機和電視等，快速地傳遞大量的訊息，使今日的通訊網無遠弗屆。