Telecommunication Electronics 62 Congresses 41 Data transmission systems 27 Telecommunication policy 26 Law and legislation 20 Periodicals 20 Equipment and supplies 19 Information technology 17 Radio 17 Social aspects 16 Switching systems 16 Electronic data processing 15 Information networks 15 Computer networks 13 Dictionaries 13 Data processing 12 Standards 12 Technological innovations 12 Telephone 12 Economic aspects 11 Information theory 11 Communication 10 Electric engineering 10 Postal service 10 Telecommunication systems 10 Artificial satellites in telecommunication 9 Research 9 Traffic 8 Computers 7