Global system for mobile communications Mobile communication systems 291 Wireless communication systems 132 Personal communication service systems 85 Security systems 78 Programmable controllers 71 Global Positioning System 65 Security measures 58 Automatic control 54 Home automation 32 Automatic tracking 30 Electronic security systems 30 Microcontrollers 29 Standards 28 Automobiles 27 Text messages (Telephone systems) 27 Flood control 26 Monitoring systems 26 Code division multiple access 25 Arduino (Programmable controller) 23 Anti-theft devices 22 Mobile computing 19 General Packet Radio Service 18 Computer networks 16 Data processing 16 Universal Mobile Telecommunications System 16 Radio frequency identification systems 15 Electronic alarm systems 14 Cellular telephone systems 13 Detectors 12