Communication, the process of transmitting and receiving ideas, information, and messages. The rapid transmission of information over long distances and ready access to information have become conspicuous and important features of human society, especially in the past 150 years, and in the past two decades, increasingly so. Communication Through Computers One of the most dramatic advances in communication potential—data communications—is found in the field of computer technology. Since the first development of the modern electronic digital computers in the 1940s, computerization has infiltrated almost every area of society in nations with advanced technology. Computers are available in many formats for use in industries, businesses, hospitals, schools, transport networks, and individual homes—and computer networks and auxiliary devices provide a means for people with use of a personal computer for the rapid transmission of a wide range of data. Use of the Internet has revolutionized access to information for the business world, libraries, education, and individuals. Publishing is increasingly happening in electronic form (see Electronic Publishing). Laser Technology The laser is also of great potential importance for the future of communications. Modulated beams of the coherent light produced by lasers can transmit a much larger number of messages at a time than can ordinary telephone systems. Prototype laser communications networks are already in operation, and they may eventually replace to a large degree the use of radio waves in telephony. Laser beams are also ideal for use in space for satellite communications systems.