Тех. перевод. С англ. на русский.

Over time, a wide range of communications media have been evolved to support human activities. In the process, new media have often assumed some (or all) of the functions of existing media. For example, Letters have been a personal communication's medium for thousand of years. In the 19th century, priority messages began to travel by telegraph, and since the end of that century, people have been able to talk to each other over the telephone. This development so revolutionized personal communication's that writing letters is a dying art - the information they contain and the functions they perform are now included in a telephone call. Telegraph has also undergone change. While it may still exist as a wire connection carrying low-speed data, it has also developed into an automatic network serving commercial and industrial establishments. Even tough the majority of message traffic has been diverted to telephone, to telex network remains a vital communication's facility in many nations. In other nations, Telegraph is being displaced by Data Communications, and both telegraph and Telephone are being replaced by Electronic Mail, and other media.
Communications media may be differentiated on the basis of the functions they perform. Thus, Books, Magazines, Newspapers and Letters supply capsules of information which are of use over a limited time. For instance: many books willbe of interest to someone for several years; on the average, magazines evoke interest over a shorter period of time; and newspapers and letters hold the interest of the majority of readers for a matter of days of less. Insofar as they all store information which can be retrieved as many times as the user desires, they can be called record media. In contrast, Telephone, Radio and Television deliver a continous stream of information, as it is produced. They can be called real-time media. So can Data Communications, the medium which permits the exchange of information between machines. As for Telegraph, it exhibits both real-time and record features.

Нет, не инструкции. На типа:


PS Это переводить не надо, это просто пример