Mobile communication systems Wireless communication systems 608 Global system for mobile communications 291 Mobile computing 183 Personal communication service systems 144 Security measures 85 Standards 75 Cellular telephone systems 72 Code division multiple access 62 Broadband communication systems 48 Wireless LANs 47 Development 45 Computer networks 44 Data processing 43 Radio 37 Application software 34 Signal processing 33 Technological innovations 33 Educational technology 32 Radio wave propagation 28 Cell phone systems 27 Internetworking (Telecommunication) 27 Design and construction 26 System design 26 Long-Term Evolution (Telecommunications) 25 IEEE 802.16 (Standard) 24 Management 24 Mobile commerce 24 Text messages (Telephone systems) 24 Cellular telephone services industry 23