Mobile communication systems 1,781 Wireless communication systems 618 Global system for mobile communications 305 Mobile computing 230 Personal communication service systems 145 Security measures 117 Standards 75 Cellular telephone systems 72 Mobile communication systems in education 70 Code division multiple access 62 Cell phone systems 59 Development 49 Broadband communication systems 48 Wireless LANs 47 Data processing 46 Educational technology 45 Computer networks 44 Mobile communication system 44 Radio 39 Application software 38 System design 34 Signal processing 33 Technological innovations 33 Mobile communications systems 31 Management 28 Radio wave propagation 28 Internetworking (Telecommunication) 27 Long-Term Evolution (Telecommunications) 27 Design and construction 26 Wireless Internet 25