Programmable controllers 3,498 Arduino (Programmable controller) 676 Microcontrollers 602 Automatic control 480 Design and construction 248 Programming 236 Microprocessors 203 Robots 159 Control systems 132 Mobile robots 132 Embedded computer systems 131 Robotics 96 Global system for mobile communications 94 Wireless communication systems 91 Electronic traffic controls 75 Detectors 70 Data processing 68 Traffic signs and signals 64 Electric controllers 63 C (Computer program language) 60 Temperature control 59 Home automation 57 Automation 54 PID controllers 52 Digital control systems 51 Sensor networks 49 Internet of things 48 Programmable logic devices 44 Equipment and supplies 43 Control 37