Wireless sensor networks Sensor networks 34 Programmable controllers 20 Wireless LANs 19 Security measures 16 Wireless communication systems 15 Motion detectors 14 Safety measures 14 Computer network protocols 12 Design and construction 9 Fire detectors 8 Internet of things 8 Automatic control 7 Computer algorithms 7 Energy harvesting 7 Microcontrollers 7 Ad hoc networks (Computer networks) 6 Automobiles 6 Biosensors 6 Data processing 6 Global system for mobile communications 6 Underwater acoustic telemetry 6 Radio frequency identification systems 5 Vehicles, Remotely piloted 5 Agriculture 4 Air conditioning 4 Control 4 Detectors 4 Embedded computer systems 4 Environmental monitoring 4