Wireless communication systems Mobile communication systems 608 Wireless LANs 353 Design and construction 316 Computer networks 209 Security measures 203 Broadband communication systems 168 Equipment and supplies 164 Global system for mobile communications 132 Antennas (Electronics) 125 Radio 111 Radio circuits 110 Code division multiple access 101 Sensor networks 93 Mobile computing 92 Signal processing 91 Cellular telephone systems 85 Radio frequency 84 Bluetooth technology 82 Standards 75 Telecommunication 75 Electric power transmission 74 Technological innovations 71 Programmable controllers 70 Optical communications 63 Data transmission systems 61 Local area networks (Computer networks) 57 Multimedia systems 56 IEEE 802.16 (Standard) 55 Ultra-wideband devices 54