Technology: general issues 14 Three term control systems 9 PID controller 8 History of engineering and technology 6 Electric control equipment 5 History of engineering & technology 5 Proportional control systems 5 Automatic control engineering 4 Controllers 4 Research & information: general 4 Adaptive control systems 3 Energy industries and utilities 3 PID control 3 Temperature control 3 Adaptive PID controller 2 Biology, life sciences 2 Condition 2 Cuckoo search algorithms 2 Extended Kalman filters 2 Fuzzy-PID 2 Global optimization 2 Hardware in loop 2 Heuristics algorithm 2 Hybrid CSA-PID 2 Hybrid cuckoo search algorithm-PID 2 Internet of Things (IoT) 2 MPPT 2 Maximum power point trackers 2 Neural networks 2 PID CONTROLLER 2