Computer networks 6 Telecommunication 4 Standards 3 Artificial satellites in telecommunication 2 Broadband communication systems 2 Cell phone services industry 2 Cell phone systems 2 Cell phones 2 Computers 2 Management 2 Security measures 2 Access control 1 Asynchronous transfer mode 1 Automatic speech recognition 1 Cell phone equipment industry 1 Competition, International 1 Data transmission systems 1 Deregulation 1 Economic aspects 1 Electronic data processing departments 1 Electronic mail systems 1 Geostationary satellites 1 Integrated services digital networks 1 Internet 1 Law and legislation 1 Local area networks (Computer networks) 1 Market surveys 1 Marketing 1 Mobile communication systems 1 Models 1