High-speed information channels

Following a brief review of the progress in the communication art that has led to today´s high-speed transmission of information, including the evolution of the carrier spectrum, the reasons for the growth of high-speed communication are analyzed. The basic operation of parallel and series data systems is illustrated through the use of typical examples. The West Coast operation of The Wall Street Journal, described here, demonstrates one way in which high-speed transmission techniques can be profitably employed in the publishing field.